Letters Regarding Byron's French Passport Letters regarding De Beer's research into Byron's trip to Switzerland and return to England, the question of whether or not he travelled through France, and whether he was granted a passport. Letters were received from the following, and carbon copies of De Beer's outgoing letters are often included: Letters from the Keats-Shelley Memorial Association, 1968-1969. Letters from Sylva, Jan 1963. Letter from Les Guides Bleus, Oct 1965. Copies of De Beer's letters to Malcolm Elwin, May 1968. Letters between De Beer and Leslie Marchard, Mar-Apr 1968. Letters between De Beer and the Director General of des Archives de France, Jan 1968. 1963-1968