the wagon-tracks a horizontal motion of several feet had taken place, the road marking its permanent effect.
We ascended Owens River valley to the source of that stream, recrossed the mountains by the bloody cañon, and descended through the great Yosemite valley, which from the higher altitude looked like a little hole in the ground.
That was the least interesting of all my four visits to that wonderful work of nature.
Our round trip occupied about seven weeks.
At our last camp, in Tuolumne meadows, some time in August, after the temperature had been above eighty degrees in the daytime, it fell below thirty at night.
I contracted a cold which developed into pneumonia, from which I did not recover for many months.
It was during my convalescence that I went with Colonel B. S. Alexander to the Hawaiian Islands, under an arrangement previously made with the War Department.
It was the year 1872 when I and Colonel Alexander, the senior engineer officer on the Pacific coast, who