Roof, fine-grained Sandstone, under which is seven inches Black Slate. FT. INS. Coal 0 6 Slate 2 0 Coal 0 7 Slate 0 4 Coal 0 5 Slate 0 5 Argillaceous and Ferruginous Rock 1 7 Coal 0 1-1/2 Bone 0 5 Coal (main bench) of good quality 7 0 Nigger-head 0 2 Coal 1 0 Slate 0 1-1/2 Coal, good 0 6 Slate and Clay 0 7 Lignite (brown coal) 2 1 Bituminous Slate 1 8 Coal 0 1/2 Nigger-head 0 4-1/2 Clay and Bony Slate 0 7 Coal 0 1 Nigger-head 0 1-1/2 Coal 0 1/16 Bituminous Slate 1 2 Coal 0 1 Slate 0 7 Coal 0 7 Slate and Sandstone bottom. --------------- Total 23 ft. 1-9/16 in. [Sidenote: Another good bed.] Seam No. 1 is only partially exposed, the workings having caved in; but enough of the seam was visible to show that it was a bright, soft, friable, bituminous coal, of good quality, containing some slate and nigger-head. Its fracture would be called _dicey_ by some geologists, because it breaks readily into small cubes, even smaller than dice. The seam is probably about five feet in thickness. [Sidenote: Geological relations.] This group probably corresponds geologically with the Kirke Mines, on Green River; but, judging by the eye, it is a more bituminous coal and better suited to coking. The large bed here may correspond with one of the large beds at the Kirke Mines. I fear that faults are numerous in the coal rocks of this group, which, of course, would add to the expense of mining. But if, as expected, it furnishes a good smelting coke, the field will be extremely valuable from its contiguity to the magnetic ores of the Cascade Mountains and the scarcity of coking coals. This property was for sale when I visited it, and would have been sold but for a claim of ownership set up by the Northern Pacific Railroad, which, however, in the opinion of good lawyers, had no foundation. [Sidenote: This the bottom group.]