I have just uploaded a new copy of the London Orchid Societies' Orchid
Picture Reference Database.
It is available at http://los.lon.imag.net/picref.asp

The new database includes an additional 3,640 picture references from
28 new sources.
The total is now 126,551 references from 1,468 books, magazines,
catalogues and other types of printed documents.

Hope you find it useful.