In 1905, the California Academy of Sciences sent 11 men off for a year and a day on an 85-foot schooner destined for the Galapagos Islands. Twenty-six-year-old Washington Henry Ochsner travelled as the expedition’s geologist, and his field book from the expedition, contributed to BHL by the California Academy of Sciences, represent a close and careful record of his scientific observations, including geological survey information and inferences about how geological features were formed.