Warner was engaged in this survey during the summer and fall of 1849, and had explored, to the very end of Goose Lake, the source of Feather River.

Then, leaving Williamson with the baggage and part of the men, he took about ten men and a first-rate guide, crossed the summit to the east, and had turned south, having the range of mountains on his right hand, with the intention of regaining his camp by another pass in the mountain.

The party was strung out, single file, with wide spaces between, Warner ahead.

He had just crossed a small valley and ascended one of the spurs covered with sage-brush and rocks, when a band of Indians rose up and poured in a shower of arrows.

The mule turned and ran back to the valley, where Warner fell off dead, punctured by five arrows.