Merle Tottenham is a mystery.   She made many films but it is very difficult to find any biographical information about her.   She was born in 1910 in India.   She commeced her film career in 1932 in the British film “Down Our Street”.   The following year she was in Hollywood where she made “The Invisible Man”, “Cavalcade” and “Night Must Fall”.   In all of these films she played domestic servants as she did back in Britain in David Lean’s “This Happy Breed” with Celia Johnson and Robert Newton.   Merle Tottenham died in 1958.   Article on “Night Must Fall” here.