Wikipedia
Mumsie
Mumsie is a 1927 British silent drama film directed by Herbert Wilcox and starring Pauline Frederick, Nelson Keys and Herbert Marshall. It was adapted from a play by Edward Knoblock about a favourite son of a family who proves to be a coward when war breaks out. Pauline Frederick's last silent film. Mumsie is a lost film. It was made at Twickenham Studios.
The film was a major success and helped Herbert Marshall establish himself in Hollywood soon afterwards.