I took these arms from a booklet titled "The Siege of Caerlaverock", written by C.W. Scott-Giles and published by The Heraldry Society in 1960. The author's note sums it up:

"This rime, which describes King Edward I.'s expedition to Scotland in July 1300, and his siege of Caerlaverock near Dumfries, is of great interest to students of heraldry for the descriptions it contains of the banners and shields of more than one hundred nobles and knights. The present (somewhat condensed) rendering into English verse is an attempt to capture the spirit of the rime, not to translate it word for word. For the benefit of armorists, ther heraldic references are given in the original French in foot-notes, the version (published in 1828) by [Sir] Nicholas Harris Nicholas being used." - CW S-G

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