Susan, I've got a 1910 edition of the Oxford Book of Ballads that has no weird characters for Robin Hood and Gandelyn (except Robin Hood and Gandelyn themselves, of course). If you like, I can transcribe the lines you can't get after I return from Labor Day vacation. By my reading of this ballad (my Middle English not being the greatest), it appears that the two of them have an archery contest a la William Tell, and Gandelyn kills Robin Hood when he misses (?!?!?). Or is it the other way 'round? Or is some third innocent person killed?