on mount, signed by artist, lower right in graphite: HF 1902; on verso of mount, by unknown hand across center in graphite: 314 - 5/8 [?]; vertical lower center in graphite: 8252; across bottom in graphite: 8252. On verso of frame, affixed label for "Loan Collection of the Photo-Secession" with ink addition: Herbert G. French / Il Penseroso.; affixed label for "L'Effort / Ve Salon 1905"
- A Subtle Beauty: Platinum Photographs from the Collection, National Gallery of Art, Washington, 2014 - 2015, unnumbered catalogue.