| Information requests | |
| 1 | Improving content on photographic techniques |
| Examples | |
| 2 | Blanquart-Evrard process prints |
| 3 | Louis-Désiré Blanquart-Evrard: reproductions of works of art |
| Photographers | |
| 4 | Maxime du Camp: Egypt |
| 5 | John Beasly Greene: Le Nil (1854) |
| 6 | Auguste Salzmann: Jerusalem |
| Information requests | |
| 1 | Improving content on photographic techniques |
| Examples | |
| 2 | Blanquart-Evrard process prints |
| 3 | Louis-Désiré Blanquart-Evrard: reproductions of works of art |
| Photographers | |
| 4 | Maxime du Camp: Egypt |
| 5 | John Beasly Greene: Le Nil (1854) |
| 6 | Auguste Salzmann: Jerusalem |