REMOVE

1. Explorers
2. [date not identified]

WHAT

1. Analogue photography (3)
2. Photography--History--19t … (3)
3. Portraits (3)
4. Naturalists (1)

WHO

1. Dresser, H. E. (Henry Eel … (3)
2. Selous, Frederick Courten … (1)
3. Severtzov, Nikolai, 1827- … (1)
4. Zarudny, Nikolai Alekseye … (1)