Southworth & Hawes
n.d.
Cloud Study

Daguerreotype
Internet - Original source ill-defined
Source requested. Sold at The David Feigenbaum Collection of Southworth & Hawes and Other 19th-Century Photographs, 27 April 1999, Sotheby's New York
 
Alex Novak, Southworth & Hawes Auction Revisited: Taking The Pulse Of The After-Market On This Extraordinary Sale, iPhotoCentral - E-Phot Newsletter, Issue #5, 9/1/1999
"Thomas Walther… bought two spectacular and important lots, the stunning modernist Clouds Study and lot 28 the Woman with Floor-Length Tresses"
 
LL/98300