collier.] RECENT DEVELOPMENT OF TIN DEPOSITS. 123 
Two thin veins of tin ore occur in the structural planes of the lime- 
stone about 400 feet northwest of the 60-foot tunnel. These strike 
parallel with the course of the dike and dip toward it at an angle 
of about 4o . One of these veins, which has been developed for about 
100 feet along the croppings, varies from 2 inches to 1 foot in thick- 
ness. The ore occurs in large ciystals, forming a comb on the walls 
of the fissure, and it also impregnates them for several inches. 
The dike which outcrops about 500 feet northwest of the main tun- 
nel on Cassiterite lode was developed by several shallow prospect 
holes and crosscuts. The rock resembles that of the Cassiterite lode, 
and like it carries cassiterite in disseminated grains. It has not yet 
been developed sufficient]} 7 to determine either its extent or the amount 
of tin ore which it contains. No systematic sampling has been done 
and no assays have been made. 
The general result of the work done on Cassiterite Creek during the 
the past season is to demonstrate that there is an ore body, about 60 
by 15 feet, in the west end of the dike known as Cassiterite lode. 
This ore body was systematically sampled as far as developed, but the 
exact average of the assays made has not been reported to the writer, 
and its extent in depth has not been tested. East of this ore shoot the 
dike probably does not contain sufficient tin to be of value. The lime- 
stones surrounding the west end of the dike contain several small but 
well-defined veins of very rich ores, and in places are so tilled with minute 
veins as to become practical^ a stockwork ore body. The bond under 
which most of the work was done last summer covered only a part of 
the ground on which tin ore has been found, and work was suspended 
because the bonding price was evidently too high in the light of these 
developments. The original locators who remained on the ground 
worked one of the small veins late in the season and produced and 
shipped to Seattle 12 tons of ore, estimated to carry from 10 to 20 per 
cent of metallic tin. Two men working the croppings of this vein 
and a third hauling with a wagon and team of three horses were able 
to mine, sack, and haul to the beach one ton of ore a day. 
TIN CREEK DEVELOPMENTS. 
Tin ore of the same general character as that at Cassiterite Creek has 
been found on Tin Creek, and prospectors report that the croppings 
of the lodes have been located, though nothing more than assessment 
work lias been done, and this merely to hold the ground. The local- 
ity was not examined by the writer. 
The whole region surrounding Lost River has been thoroughl\ T 
searched for croppings of tin-bearing ledges, with the result that a 
number of porphyritic dikes, some of which are mineralized with 
