On the always fascinating site Letters of Note:
Early 1957, Jack Kerouac and Allen Ginsberg travelled to Tangier to join William Burroughs; their mission to assemble and edit Burroughs’ many fragments of work to form a ‘readable’ Naked Lunch manuscript. Kerouac arrived early and, during a break from socialising with Burroughs, the ‘old familiar lunatic’, wrote to Lucien Carr and his wife Francesca in order to update them on the project’s progress. That handwritten letter — essentially a fascinating account of Burroughs’ behaviour in his prime — can be seen [here].
For related material — including other correspondence, manuscript pages and photographs — I very highly recommend visiting Columbia University’s online exhibition, “Naked Lunch”: The First Fifty Years.
Dear Lucien & Cessa — Writing to you by candlelight from the mysterious Casbah — have a magnificent room overlooking the beach & the bay & the sea & can see Gibraltar — patio to sun on, room maid, $20 a month — feel great but Burroughs has gone insane as, — he keeps saying he’s going to erupt into some unspeakable atrocity such as waving his dingdong at an Embassy part & such or slaughtering an Arab boy to see what his beautiful insides look like …