Fig. 2From: Lost and found: the posthumous portrait of Louis Agassiz by Henry Ulke (1876), and their noteworthy relationshipCarte-de-visite photograph depicting Louis Agassiz, bearing the 1876 backstamp of Julius Ulke (ex Ulke Family Collection, Swann 2013, sale 2324, lot 328, in part); note the card was erroneously identified as ‘F.E. Spinner’, United States General and Treasurer, probably by Titus Ulke, Henry’s eldest son; courtesy of ERB libraryBack to article page