| Carleton E. Watkins Crystal Springs Valley. Watkins' wagon visible on the right [Sun Sketches of San Mateo, 1875] 1875 Albumen print Bancroft Library, University of California Berkeley Collection: Watkins (Carleton E.) Sun Sketches, Identifier: BANC PIC 1974.006:20--ffALB LL/105112 (Alan Griffiths, 6 October 2020) I'm indebted to James Eason at the Bancroft Library for bringing this photograph to my attention.
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