This lists all identified correspondents. Their letters can only be accessed through the Letters page.
McHenry, James merchant, railway contractor, 1816?-1891 ?
Machin, Charles E. owner? of the Theatre Royal Sunderland
Mack, Mr correspondent 1886
Mackail, John William, 1859-1945 scholar, writer, poet
Mackail, Margaret, née Burne-Jones, Mrs John William, 1866-1953 daughter of Sir Edward Burne-Jones
Mackay, John M.
Mackaye, James Morrison Steele, 1842-1894 American designer, manager, actor, playwright
Mackellar, Duncan, 1849-1908? painter, of the Art Club, Glasgow
McKenna, Ethel Morell, née Morell daughter of Sir Morell Mackenzie
Mackenzie, Sir Alexander Campbell, 1847-1935 composer
Mackenzie, Alfred W. brother of Sir Morell Mackenzie
Mackenzie, Margaret, née Bouch, Lady wife of Sir Morell Mackenzie
Mackenzie, Mary Malina, née Burnside, Lady wife of Sir Alexander Mackenzie
Mackenzie, Sir Morell, 1837-1892 physician, throat specialist
MacKinlay, Jean Sterling, afterwards Mrs Harcourt Williams, 1882-1958 producer