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Worked on skeleton today but shale was so wet that I merely cut down the sides of the matrix and let it dry out. Did not try to plaster the slabs. Found some fish vertebrae three inches in diameter also several tails and skulls. Baculites are very numerous all through the shales and are crushed flat. Some are two and a half feet long. Heard the first coyote chorus this morning. Had a heavy frost last night. The alkali water was too much for me last night, felt sick all morning so prospected the other two blowouts close to camp. Found several fish skulls and the first Pterydactyls bones discovered in the Fort Pierre formation of this is such; they are merely fragments but unmistakable In the afternoon I rode Billy over to Cottonwood Creek about ten miles west. Found very few blowouts and no fossils. In country seems of limited area, confined to the one horizon of black shale. Saw two coyotes and two antelopes this afternoon