New to Typophile? Accounts are free, and easy to set up.
I would be very grateful if someone could tell me about the original (historical) source for the so-called "Potsdam Initials" as appearing in one of Dan X. Solo's books for Dover Publications ("Celtic and Medieval Alphabets", 1998). I am finishing an OpenType adaptation of such initials and would like to credit them appropriately (or ask for the corresponding permissions in case they are somehow copyrighted).
Thanks in advance for your help.