Watson M. Perrygo (1906-1984) was a field collector, taxidermist, and exhibits specialist for the United States National Museum (USNM). During his career at the Museum he traveled extensively and conducted field work with several notable scientists. In 1928-1929, he travel to Haiti to collect with W.M. Poole. Perrygo documented this work with numerous photographs. In several cases the captions he included dramatically alter the way one understands the meaning of the image he's taken, like the picture below. Perrygo's one sentence, recorded on the back, makes quite clear just how challenging travel was on the island.
"This stream is crossed 37 times in 7 1/2 miles distance between St. Michel and Marmalade, Haiti."