'Leathermouth is the nickname of Colonel Gantian, who has been engaged by Scotland Yard to look after the welfare of Paul, rule of a small East European kingdom, while he is on a visit to England. The king has made enemies in his own country, and the presence of some of them is soon made apparent to Leathermouth. The king and he are associated in some thrilling experiences, including attempts on their lives, but eventually they come through safely.'
Source:*
'Leathermouth's Luck', Newcastle Morning Herald and Miners' Advocate, 22 August 1935, p.6.