Ars Quatuor Coronatorum on Google Book Search
Studying the ritual is its own great reward. I had another fun disagreement about the meaning of this section of the Entered Apprentice Apron presentation:
...more ancient than the Golden Fleece or Roman Eagle, more honorable than the Star and Garter or any other order that can be conferred upon you by Prince, King, Potentate or any other person except he be a Mason...
The latter two are well understood by all to refer to an order of knighthood in England and one in France: Order of the Garter (c1346) and Order of the Star (1352). I recall reading that the former two are also chivalric orders and do not, in fact, refer to Greek mythology and the symbol of the Roman legions. Details about the Order of the Golden Fleece (c1430) were easily found onWikipedia. I was not able to find anything about a chivalric order related to the Roman Eagle, but I suspect with more work I can unearth the original references.
In the process of all this research, I was delighted to stumble upon a number of old Ars Quatuor Coronatorum on Google Books! Any student of Masonic history will have their breathe taken away by the paper from Bro. Hughan "The York Grand Lodge - A Brief Sketch". Then on page 20, in the responses to the paper, there are comments from none other than Bro. Chetwoode Crawley! Finding this material online is like finding a great treasure in your basement.