Meynell's correspondents include Boston College Library (Terence L. Connolly), John Carter, Pierre Danchin, Charmazel Dudt, Mrs. Hart, William Doyle Hennessy (including transcripts of letters between Hennessy and Wilfrid Meynell), Christopher Hollis, Aimée Marchant, John F. McKinney, Pierre Messiaen, Percy H. Muir, Nicholas Kaye Limited (Stanley Pickard), Myrtle Pihlman Pope, David A. Randall, Sydney Snell, Olivia Sowerby, and John Walsh. Some of the letters concern the sale of manuscripts belonging to Olivia Sowerby. Others concern copyright and permission to publish compositions of Thompson.