| Description | Completed "Ability in Family" questionnaires, biographical notes and letters, plus typescript entries taken from Who's Who. Forms were received from:
Macalister, Professor A
McClean, Frank
McClintock, Admiral Sir Francis
McIntosh, Professor W G
McKendrick, John G
Mallet, John Lewis
Mallock, A
Markham, Sir Clements R
Marr, John E
Maskelyne, Mervyn Herbert Nevil Story
Masson, Professor D Orme
Masters, Dr M J
Masthers, J B
Matthey
Maxwell, the Rt Hon Sir Herbert
Medlicott, H B
Meldola, Professor Raphael
Miall, Professor Louis C
Miers, Professor Henry A
Milne, Professor John
Mott, Dr Frederick W
Morgan, C Lloyd
Muir, Thomas |