For most of the foregoing details regarding the early history of this district, I am indebted to Captain David B. Stover, who has been familiar with the progress of mining there and in other parts of Utah since the first discovery in 1863. The following are special details of several of the principal claims.

Great Central, first northern extension, 1,000 feet; located in August, 1864; vein 3 feet wide; assays $100 per ton in silver, and 45 per cent. lead. The development in April, 1871, consisted of an open cut 30 feet long, with a pit 10 feet deep at each end. Ten tons of ore had been shipped. Owners, Connor, Stover, Butler, and Kean.

Bolivia, 1,000 feet; located in 1865; ore an argentiferous galena, assaying $40 to the ton, and giving an average of 35 per cent. of lead. Seventy-five tons of ore have been shipped, and there was about the same quantity on the dumps. The development consists of a shaft 132 feet in depth; vein represented as 3 feet wide. Owned by Connor, Stover, Brown & Co. Wood and water plenty.

Eureka: Located in 1864, and work commenced in the same year; vein 4 feet to 6 feet wide; average assay value in silver $75; lead 60 per cent. Opened by a tunnel 140 feet long run in to cut the vein, and by an excavation on the surface equal to 100 cubic yards. The tunnel had not reached the vein in July, 1871. Only about 20 tons of ore had been taken out up to that time. Owners, Connor, Stover, Church & Co.

Hard Times: The claim was located in 1864, and is 1,200 feet in length; vein 18 inches wide, in limestone; ore is a hard, green-stained carbonate. Assays average $100 to the ton, but they have reached as high as $550. Native silver in small scales has been found in this lode. Opened by two shafts, each about 12 feet deep. Several tons of ore were taken out. Owners, Connor, Stover, Benson & Co.

Lady Douglas, 1,700 feet; located in 1865; vein, 2 feet wide; ore, galena and carbonate of lead; assay value about $50 to the ton in silver and 40 per cent. of lead; opened by a cut of 20 feet in length, and by several pits, each a few feet deep; also by another cut 25 feet in length. This vein is said to have been traced for 1,000 feet; about 3 tons of ore have been taken out. Owned by Butler, Kean, Stover, and others.

Exchange: Location 800 feet in length; vein said to be 6 feet wide and the ore to assay $30 per ton in silver, and 48 per cent. of lead; opened by a pit 8 feet deep; work commenced in March, 1871; owned by Butler, Rice, Chase, and Kean.

Elizabeth: 1,200 feet located; vein 18 inches wide; average assay of silver, $50 per ton; lead, 40 per cent.; opened by a shaft 12 feet deep, and by an open cut 25 feet long; work commenced in 1866; twenty tons of ore have been taken out by the owners, Messrs. Carle, Stover & Co.

Quandary: Length of claim, 1,200 feet; vein, 3 feet wide; average assay, $45 in silver, and 50 per cent. of lead; shaft 110 feet deep; work commenced in 1864; resumed in 1871, and 10 tons of ore taken out; owners, Chase & Co.

Pendleton: Length of location, 1,200 feet; vein, 2 feet wide; average assay, $55 in silver per ton, and 40 per cent. of lead; opened by a shaft about 60 feet deep; work commenced in 1864; about 10 tons of ore have been taken out; owned by Stover and Butler.

Last Chance: Length of location, 1,000 feet; vein, about 2 feet wide; averages in silver $100 per ton, but samples have assayed as high as $1,400; average yield of lead, 40 per cent.; opened by a shaft 35 feet deep, and by several cuts on the surface across the vein; quantity of ore, about 5 tons; owned by Nevitt, Stover, Connor & Co.

Rush Valley: Location, 1,200 feet long; vein, 2 feet wide; ore, an argentiferous galena, assaying $40 in silver, and 30 per cent. of lead; shaft 8 feet deep; work commenced in 1864; owned by Connor, Chase, and Gibson.

Silver King-first extension west: Location, 1,000 feet; vein, 4 feet wide; average assay, $30 per ton in silver, and 55 per cent. of lead; one shaft is 165 feet, and one 40 feet deep; work was commenced in 1865. This was owned by the Argenta Silver Mining Company. Sixty tons of ore have been taken out. It is now owned by Dilidine, Stover, and Benson.

Potomac: Location of 1,200 feet made in 1864; vein, 3 feet wide; shaft 100 feet deep; 25 tons taken out; assay value is about $55, silver, and 60 per cent. of lead; owners, Bayliss, Kerr, Benson, and Stover.

Constitution: Location, 1,000 feet; made in 1864; vein, 1 foot wide; ore assays $50 per ton in silver, and 60 per cent. of lead; shaft 15 feet deep; and 10 tons of ore have been taken out; owners, Church, Stover, and others.

Pleasant Hill: Location, 1,100 feet; vein, 2 feet wide; average assay in silver $35 per ton, and 55 per cent. of lead; worked by an open cut 30 feet long and a shaft 12 feet deep, in 1865; twenty tons of ore were taken out. Relocated under the name of "Grand Cross" in 1870. It is now opened by a tunnel 130 feet long and a shaft 30 feet deep. More than 100 tons of ore have been taken out since 1865. Some of this ore was shipped to San Francisco, and some has been worked at Simon's Furnace. Owners, Payne, Paxton, and others.

Silver King: Location, 1,000 feet; vein, 5 feet wide; ore, argentiferous galena and carbonate of lead; average assay value $40 per ton in silver, and 50 per cent. of lead; opened by two shafts, one 200 feet deep, and the other 50 feet. There are also a tunnel 150 feet long connecting with one of the shafts, and drifts equal to 100 feet more in length. Work was commenced in 1865; 300 tons of ore have been taken out, most of which was sent to San Francisco. A part was worked at Simon's Furnace. Owners, Gail, Connor, and others.

Defiance: Location, 800 feet; vein, 4 feet wide; assays $40 per ton, and 40 per cent. of lead; opened by a tunnel 65 feet long; work commenced in December, 1870; only about 2 tons have been taken out; owned by Butler, Rice & Co.

John Adams: Location, 1,000 feet; vein, 2 feet wide; assays $40 in silver, and 35 per cent. of lead; opened by a shaft 10 feet deep, and by cuts in the surface; worked in 1865 and reworked in 1870; only 2. tons of ore taken out; owned by Butler, Kean & Co.

New York Lode: Location, 1,000 feet; vein, 18 inches wide; the ore is a hard carbonate of lead, some of which has assayed as high as $3,000; the average is about $125 in silver, and about 40 per cent. of lead; shaft, 45 feet deep; owners, Nichols, Stover & Co.

Saint Patrick: Location, 1,400 feet; vein, 3 feet wide; ore assays $40 in silver, and 60 per cent. of lead; shaft 90 feet deep; work commenced in 1871, soon after the discovery; probably 100 tons had been taken out in July, 1871. The ore is smelted at Simon's Furnace.

Legal Tender: Location, 1,000 feet; vein, 3 feet wide; average assay $50 in silver, and 60 per cent. of lead; 100 tons taken out; work commenced in 1871; owned by True, Tiernan & Co.

Putnam: Location, 3,000 feet; vein, 3 feet wide; average assay $60

in silver, and 40 per cent. of lead; opened by cut and shaft, the latter 60 feet deep; owners, Delamater, Wells & Co.

Tucson: Location, 1,000 feet; vein, 3 feet wide; ore assays $40 in silver, and 55 per cent. of lead; opened by a shaft 100 feet deep; owned by George Berry & Co.

Ophir or East Cañon district. This district was formerly, as mentioned above, a part of the Rush Valley or Stockton mining district. Horn-silver and other rich silver-ores were found August, 1870. The Silveropolis mines have since yielded from $50,000 to $75,000 of base bullion. Some of the most prominent claims in April, 1871, were the Tampico, Mountain Lion, Mountain Tiger, Petaluma, Zella, Silver Chief, Defiance, Virginia, Monarch, Blue Wing, Silveropolis. It is now probably the most productive district of the Oquirrh range. Mining is prosecuted with energy and success, and mills and smelting-works are in full operation. Up to April, 1871, over five hundred locations had been recorded. One furnace was in operation, and two more were erecting. Ophir City, the center, was a thriving town of one thousand to twelve hundred inhabitants, and it is increasing in importance daily. It is located in a cañon leading from the center of the range to the open plain or valley south of Rush Lake, and is accessible by carriage-road from Salt Lake City in one day. Stages run daily, passing around the south end of Salt Lake through Rush Valley and the town of Stockton.

There are two distinct groups of mines; the one north of the town affording an abundance of galena and pyritous ores of low grade, while the other, upon Lion Hill, south of the town, yields a richer class of ore, the decomposed portions of which can be successfully treated by the ordinary mill processes.

This Lion Hill, or rather mountain, (for it rises abruptly some 2,000 feet above the town,) is noted for the quantity and richness of the silverore it has already yielded, and for the number of silver-producing claims located upon it. It is formed of a great mass of limestone strata, which here rise in one grand anticlinal curve. The edges of these strata show in an almost vertical wall along the valley which cuts directly through them transverse to the axis. The silver deposits crop out between the upper layers of rock, which there pitch to the eastward at an angle of about 200. The outcrops are upon the brow of a very steep descent, facing the west, and overlooking the valley and the cañon below the town. The new mill erected there by the Walker Brothers, of Salt Lake City, is directly in sight below, and is not more than a mile distant. But as the descent is too abrupt for a roadway the ores are not sent directly down, but are carted in the other direction along the ridge, descending gradually by the bed of the ravine to Ophir City, and thence a mile further down the valley to the mill.

The ores of Lion Hill are chiefly the soft, ochery, and earthy-looking mixtures resulting from the decomposition of argentiferous galena and other argentiferous minerals containing antimony and arsenic. An examination made by Mr. Blake of a portion of ore taken from the Rockwell claim showed that the silver existed in it in the form of chloride, so that it could be easily and cleanly worked in a mill without preliminary roasting. But there are also large quantities of carbonate of lead and nodules of antimonial galena, which require roasting or smelting in order to liberate the silver contained in them.

Most of the ore in these claims is soft enough to be taken out without the use of powder, the pick and shovel sufficing to detach it. It is wheeled out through tunnels to the surface, and is there packed in canvas sacks for shipping or for sending down to the furnaces or mills. The veins lie at such an angle upon the hill that they are readily and cheaply opened by tunnels, and do not require expensive shafts and machinery for hoisting or pumping. There is as yet no water of consequence in any of the excavations. Apparently it freely finds its way downward through the crevices in the limestone, so that no difficulty from that source need be expected in depth.

It is proposed to run a tunnel directly through the mountain at a depth of about 2,000 feet below the principal claims. The survey of McLaren's East Cañon tunnel shows that the height of some of the principal points and claims above tide is as follows:

Silver City, or the valley just below it, is found to be nearly 6,675 feet above the sea.

Probably the largest amount of ore has been shipped from the Mountain Lion claim. The Occidental, Tiger, Rockwell, Zella, and Silver Chief are all. prominent claims, and have yielded notable quantities of good

ore.

The last-mentioned claim is reported to have had, on the 1st of August last, from 250 to 300 tons of excellent "chloride ore" upon the dump, and to be opened by a tunnel 120 feet long, with a drift 40 feet long to the northward, showing a fine body of ore extending north and south.

Mountain Tiger, Rockwell, and Zella. - These three contiguous claims, after having been successfully worked separately, have recently been consolidated, and are being systematically developed by tunnels and shafts, under the superintendence of Mr. Mark Daly. Some details regarding the production and value of the ores of these claims will serve to give a general idea of the value of the ores from other claims in the immediate vicinity.

The greater portion of the work has been done upon the Mountain Tiger claim. It is opened by a tunnel and open cut 150 feet in length, following the ore for a part of the distance, and ending in an inclined shaft reaching under the outcroppings of the Rockwell claim, to connect there with a shaft sunk from the surface. At the bottom of this incline, in August last, a small oven-like cavern was opened into, and the floor was found covered with a yellowish, earthy deposit, which, though not very promising in its appearance, contained at the rate of over $2,000 per ton in silver. It appeared to be a mixture of chloride of silver and oxide of antimony.

Upon the Zella claim the ore came up to the surface of the ground, and has been excavated for about 75 feet in length and to a depth of 15 to 20 feet, for most of this depth under the overhanging wall of limestone. The thickness varied from 2 to 5 feet, and the ore was very rich. Both this claim and the Mountain Tiger have yielded large quantities of ore. Some of it has been worked in the Pioneer Mill of Messrs. Walker & Brothers, and some has been shipped. The value of the ores on the dump-piles in August last was estimated at $135,000 by the superintendent, and the total of ore out and in sight in the three claims at over $360,000. On the 30th of August last the shaft in the Petaluma workings (a portion of the Mountain Tiger claim) was 30 feet deep, and showed ore all the way.

In regard to the value of these ores, as raised, there is abundant and satisfactory information. Large sales have been made from time to time, the value being ascertained by average sampling and careful assays. Most of the lots of ore offered for sale were purchased by Mr. С. Т. Meader, of Salt Lake City, at from 63 to 65 per cent. of the assay value. The value of several lots is shown in the following table:

Returns of sampling and assay of mine lots of ore from the Mountain Tiger

claim.

Returns of sampling and assay value of eleven lots from the Zella claim.

An average sample of the ore standing in the Tiger claim in August, yielded at the rate of, silver 185 ounces, value $239, per ton of 2,000 pounds. An average sample of the Zella claim previously taken gave $138.86 as the value in silver.

Silveropolis, Tampico, Occidental, and other claims.-About a mile beyond the Mountain Tiger claim, on Lion Hill, in the direction of Camp Floyd, there is a group of claims from which a considerable quantity of richchloride-of-silver ore has been taken. At the Tampico a great open cut along the slope of the hill exposes the ends of curved strata of limestone for 250 or 300 feet. The limestone is hard and flinty, and irregularly seamed with masses of dark-colored calc-spar, some quartz and heavy spar. Good ore is found in the midst of these seams, but not in any clearly defined or regular vein.

At the Silveropolis claim horn-silver was found interstratified with