Like the prospector for gold, the fossil-hunter may pass suddenly from the extreme of dejection to the extreme of elation.

Luck comes in a great variety of ways: sometimes as the result of prolonged and deliberate scientific search in a region which is known to be fossiliferous; sometimes in such a prosaic manner as the digging of a well.

Among discoveries of a highly suggestive, almost romantic kind, perhaps none is more remarkable than the one I shall now describe.
_Discovery of the Great Dinosaur Quarry._ In central Wyoming, at the head of a "draw," or small valley, not far from the Medicine Bow River, lies the ruin of a small and unique building, which marks the site of the greatest "find" of extinct animals made in a single locality in any part of the world.

The fortunate fossil-hunter who stumbled on this site was Mr.Walter Granger of the American Museum expedition of 1897.
In the spring of 1898, as I approached the hillock on which the ruin stands, I observed, among the beautiful flowers, the blooming cacti, and the dwarf bushes of the desert, what were apparently numbers of dark-brown boulders.

On closer examination, it proved that there is really not a single rock, hardly even a pebble, on this hillock; all these apparent boulders are ponderous fossils which have slowly accumulated or washed out on the surface from a great dinosaur bed beneath.