I'm far from an uncritical advocate of electronic media, but this digital age does offer some wonderful resources. Digitized books make literary resources far more available than they are otherwise.
Stephen Kendall donated a delightful book, A Little Journey Among Anconas, Second edition, 1922, to SPPA's growing collection of historic poultry books. This book is limited in physical access, but the entire work can be viewed online at http://www.archive.org/stream/littlejourneyamo00shep.
The book has two color plates, showing the color of the birds. The rest are black & white. It includes diagrams of ideal body conformation as well as photographs. Check this gem out and recommend it to colleagues who are interested in Anconas. They remain a terrific Mediterranean egg breed.