"Everyone wanted to identify with [Hayden's] success, especially the politicians. . . . Though most could not accompany the survey itself, several managed to place their friends with Hayden for a summer or two as 'general assistants.' Thus Garfield found a place for Professor Edmund Wakefield of Hiram College, Representative Monroe did the same for Rush Taggart, and so did a number of other congressmen, including Representative Dawes and Senator John Logan, who placed relatives with the survey. Hayden told one colleague that during the summer 1871 he would be taking along six political appointees and he had turned away another fifty. These general assistants were supernumeraries, of course, though Hayden squeezed whatever useful services he could from them." 
F. J. Huse
"His recruitment of the four University of Pensylvania graduates clearly paid off in dedicated workers. The gamble on George Allen didn't. But neither did the appointment (on Spenser Baird's recommendation) of an apparently highly qualified naturalist, Frederick Huse. Huse had been the assistant secretary of the Academy of Natural Sciences in Chicago, and was to serve as the survey's ornithologist. Hayden's letters to Baird become increasingly negative about Huse's contributions. By the time the party had marched from Ogden to Fort Ellis, Hayden was writing: 'I know but little what Huse is doing. I think not much--something perhaps.'" 
"[There were] a half-dozen youths, sons or proteges of men prominent in Washington, who were assigned various duties as collectors in natural history and as all-round assistants. To these boys, however, the whole business at first was very much a lark, and the affairs concerning their horses, guns, fishing tackle and other equipment were of greater importance than the duties assigned to them." 
Chester M. Dawes
"Hayden was still faced with the job of filling other survey positions. Deluged with applications and recommendations, he later confessed that he chose some survey members who had influential fathers or relatives. Before the expedition got underway he wrote George Allen: 'Politicians have had about six appointments. Genl Logan has two. Genl Negley's son goes, possibly a son of [Congressman] Dawes. . . and others.' Hayden had no problems justifying these appointments, for the good feelings of Congressmen helped Hayden secure appropriations for his surveys, and the influence of top Army personnel helped him obtain horses, mules and equipment at cost." 
C. De V. Negley
"Mr. Campell Carrington had charge of the zoological collections during the years 1870 and 1871, and performed his duties with great zeal and efficiency. His collections of fish and reptiles are quite complete. He was assisted by Messrs. Dawes, Logan, Negley, and Duncan." --F. V. Hayden 
"I learned that Goodfellow's ambulance had upset on the way, throwing him out, also Duncan, who was in it." 
- Mike Foster, Strange Genius: The Life of Ferdinand Vandeveer Hayden (Niwot, CO: Roberts Rinehart Publishers, 1994), pg. #227.
- "U.S. Geological Survey Photographic Library," U.S. Geological Survey Photographic Library, 1871, section goes here, accessed November 21, 2012, photo by W. H. Jackson, http://libraryphoto.cr.usgs.gov/htmllib/batch03/batch03j/batch03z/batch03/jwh00589.jpg
- Merrill, Marlene. With Hayden in the Field : a Case Study Based on Unpublished Letters and Diaries from the 1871 Yellowstone Survey. 1993. Yellowstone Research Center Archives.
- William Henry Jackson and Howard R. Driggs, The Pioneer Photographer: Rocky Mountain Adventures with a Camera (Yonkers-on-Hudson, NY: World Book Company, 1929), 100-101.
- George Black, Empire of Shadows: The Epic Story of Yellowstone (New York: St. Martin's Press, 2012), pg. #486.
- "U.S. Geological Survey Photographic Library," http://libraryphoto.cr.usgs.gov/htmllib/btch508/btch508j/btch508z/btch508/jwh273v3.jpg
- "U.S. Geological Survey Photographic Library," http://libraryphoto.cr.usgs.gov/htmllib/batch03/batch03j/batch03z/batch03/jwh00587.jpg
- F. V. Hayden, Preliminary Report of The United States Geological Survey of Montana and Portions of Adjacent Territories; Being A Fifth Annual Report of Progress (Washington: Government Printing Office, 1872), pg.4.
- Marlene Merrill, ed., Yellowstone and the Great West: Journals, Letters, and Images from the 1871 Hayden Expedition (Lincoln: University of Nebraska Press, 1999), 104.