An interesting selection of World War I Photographic glass slides taken by group Captain Seabrook, (in World War I he was an observer for the RFC). Some are entitled, e.g. 'Albatross D.V. After being shot down our side of the. . Note RFC trailer and air mechanics' and 'Vertical photograph taken at 7000 ft from a B.C.2.C. Showing Hun battery - British shell turrets and German battery dug outs winter 1916-17.' most appear to be 'rial photographs