1956 – The Ancrene Riwle (Preface by Tolkien) – 1st Edition – Hardcover– University of Notre Dame Press

UK edition published a year earlier by Burns & Oates in England. I have been unable to locate a copy with a dustjacket.

Edition, First Edition, First Edition and First State, First State, Hard Cover, Misc Tolkien, Rare, Scholarly Works and Lectures, The Ancrene Riwle