
1) Anglo-Norman literature
Found on
https://www.crosswordclues.com/clue/protheselaus

Protheselaus is a verse romance composed in Anglo-Norman by Hue de Rotelande at the end of the 12th century. Hue lived at Credenhill near Hereford, according to his earlier poem Ipomedon. Protheselaus is dedicated to Hue`s patron Gilbert fitzBaderon, lord of Monmouth. Gilbert died in or just before 1191: that date is a terminus ante quem for the ....
Found on
http://en.wikipedia.org/wiki/Protheselaus
No exact match found.