Titel

• [Brief Watsons an Schulze-Gävernitz] Watson, Robert Spence ; Schulze-Gävernitz, Gerhart von Gateshead on Tyne, 26.4.1892 [26th. April 1892]

• [Brief Watsons an Schulze-Gävernitz] Watson, Robert Spence ; Schulze-Gävernitz, Gerhart von Gateshead on Tyne, 16.7.1897 [16 : VII : 1897]

• [Brief Watsons an Schulze-Gävernitz] Watson, Robert Spence ; Schulze-Gävernitz, Gerhart von Gateshead on Tyne, 28.5.1894 [28th May 1894]

• [Portrait-Photographie von Watson] Watson, Robert Spence London : Elliott & Fry, 1890 [um 1890]