Photographs open doors into the past, but they also allow a look into the future.

No previous history of photography, that I am aware of, has ever assumed the form of a reminiscence, nor have I met with a photographic work, of any description, that is so strictly built upon a chronological foundation as the one now placed in the hands of the reader.

I therefore think, and trust, that it will prove to be an acceptable and readable addition to photographic literature.