59 John's Street
59 John's Street, Oxford, was J.R.R. Tolkien's undergraduate lodgings whilst he was studying at the University of Oxford. He wrote a poem about the Cottage of Lost Play there on 27-28 April, 1915.
J.R.R. Tolkien, Christopher Tolkien (ed.), The Book of Lost Tales Part One, "The Cottage of Lost Play": "Notes and Commentary"