A lot of the discussion between photographers happened in the periodicals of the time. For instance, Hiley (referred to above) drew (extensively) on Amateur Photographer, The Practical Photographer, The British Journal of Photography, The Photographic News, Photography, Camera Notes, The Journal of the Camera Club, The Studio and The Photographic Journal.
… and made just two references to these books:
Lake Price, A Manual of Photographic Manipulation Treating of the Practice of the Art and its various applications to Nature (second edition, London, 1868).
H. P. Robinson, Picture Making By Photography (second edition, London,
1889)