The Amazing Blondel were photographed in Scunthorpe Museum- on a bed with a great Dane (dog!).
Blondel the historical personage was a royally patronised, therefore professional musician in the court of Richard the Lionheart. He may have been a strolling player, but was more of a singer/songwriter than a Folkie. I am not aware of any studio sessions he did, though he is said to have broadcast his songs (acoustically) outside a number of dungeon windows- which makes him a precursor of Johnny Cash with his Folsom Prison and San Quentin gigs.
Cheers
Dave