According to his directions, I took the fragment in the pincers by the sharp edge, so as to leave the rest free to be worked upon. Gradually exposing it to the heat, I held it for a moment over some coals freshly raked from the fire, and then held it before him, while with the end of a pine needle he laid a tiny drop of water near the lower corner, about a quarter of an inch back from the squared edge. There was a faint hiss of steam, but no apparent change in the surface of the rock. We tried it again, dropping the water in the same place. _Pip!_ A small scale half the size of the little finger nail snapped off and left a little trough in the square edge. We both gave cries of delight; it seemed that we had hit on the right way to do the work.
A little more experimenting showed that the piece should be held slanting downward in the direction in which the flaking was to be done, for the cold water caused the rock to scale in the direction in which the drop ran. In the course of two hours the rough piece of obsidian was chipped down to a small arrow-point--one that Pitamakan's grandfather would have scorned, no doubt, but a real treasure to us.
We worked all that day making the points; when evening came we had five that were really serviceable. At sundown, the weather having cleared, we went to look at the rabbit-snares. As neither had been sprung, we moved them to a fresh place. This last storm had added a good deal to the depth of the snow; it was so much now above our knees that walking in it was hard work.
We had now before us a task almost as difficult as making the points; that is, to find suitable material for our bows and arrows. We found none that evening, but the next morning, after visiting the snares and taking one rabbit, we stumbled on a clump of service-berry treelets, next to ash the favorite bow-wood of the Blackfeet.
Back to the camp we went, got our "anvil" and hacking-stones, and cut two straight, limbless stems, between two and three inches in diameter. Next we had a long hunt through the willows for straight arrow-shafts, found them, and got some coarse pieces of sandstone from the river to use as files.
Two days more were needed for making the bows and the arrow-shafts. The bows were worked down to the right size and shape only by the hardest kind of sandstone-rubbing, and by scraping and cutting with obsidian knives. But we did not dare to dry them quickly in the fire for fear of making the wood brittle, and they had not the strength of a really good weapon.