Correspondence set aside by Boosey & Hawkes because of its particular archival value, involving individuals with names beginning with letters between K- and M-.
Correspondence to, from or relating to individuals or organisations with names beginning M-: Edgar Moy, Giuseppe Montanari, Gerald Moore, Berkeley Mason, Arthur Meale, Robert Mayer, the Opera of Monte-Carlo (with Raoul Gunsbourg and Rudolf Bing), Malcolm McEachern, Herbert Menges, Clive Muncaste...