Malaya. (Negri Sembilan). 1940. Air Mail envelope addressed to England bearing Negri Sembilan SG 21, 1c black, SG 22, 2c green (pair) and SG 33, 25c purple and scarlet (pair) tied by Nilai/ F.M.S. double ring '26th Sept 1940', endorsed 'By Air' with brown censor label tied by 'Passed By/ Censor 33/ Singapore' in violet on face and reverse.