| William Henry Jackson [Attributed to]
[Jackson's Assistant leading a mule loaded with photo equipment] 1873 (taken) Gelatim silver print 5 x 8 ins Brigham Young University - Harold B. Lee Library Digital Collections
L. Tom Perry Special Collections, Call Number: MSS1608 Item 941 LL/95456 See also:
Library of Congress, Reproduction Number: LC-DIG-det-4a26901 (digital file from original), Call Number: LC-D418-7173 [P&P]
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