Which Oxford college did J.R.R. Tolkien serve as a fellow and tutor after returning from Leeds?

J.R.R. Tolkien served as a fellow and tutor at Pembroke College, Oxford, after returning from Leeds.

Tolkien became Rawlinson and Bosworth Professor of Anglo-Saxon at Oxford in 1925 and held that post until 1945. During this period he was associated with Pembroke College, where he taught and developed much of the imaginative material that later became The Hobbit and The Lord of the Rings.

His academic work focused on language and medieval literature, especially Old English. Tolkien’s professional scholarship and his invented languages developed alongside one another, although his fiction was not simply a by-product of his university teaching.

In 1945 Tolkien moved to Merton College when he became Merton Professor of English Language and Literature. That later association explains why Merton is often given as an answer, but the college connected with his earlier Oxford professorship was Pembroke.