A collection of old cookbooks on-line:

[Delmonico]

http://digital.lib.msu.edu/projects/cookbooks/html/browse.html

I found this a while back, what a treasure.


And from Rattlesnake Jack:

Here is something which may be of interest to Victorian-era cooks and military re-enactors alike - a relatively slender volume (a bit over 50 pages) published by the British War Office in 1878, entitled "Instructions to Military Cooks in the Preparation of Dinners at the Instructional Kitchen, Aldershot". (Established during the Crimean war in the early 1850's, Aldershot Camp became the primary military training base for the British Army.)

Entire original volume, viewable and downloadable in PDF format - http://books.google.com/books?id=evIHAAAAQAAJ

And from Sir Charles deMouton-Black:

The original of this cook book from 1557 is held at Corpus Christie College at Cambridge.  Here is a later re-print;

http://www.uni-giessen.de/gloning/tx/bookecok.htm