"Henry N. Sweet (?–1933) was assistant to Edward Herbert Thompson, the American Consul in Mérida. He was the photographer for Thompson’s expeditions to Uxmal, Kabah, Sayil, ...
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and Labná in 1888–1891, and Alfred Percival Maudslay’s exploration of Chichén Itzá in 1889." - http://www.getty.edu/research/tools/guides_bibliographies/photography_mexico/photographers.html, 08.12.2018
