'The plot of Carlton Dawe's latest novel, "The Missing Treaty," traverses well-trodden ground, but his crispness of dialogue and expert arrangement of the events of the plot combine in making the story one that people can read and enjoy. "Leathermouth," otherwise Colonel Peter Gantian, hero of several Dawe novels, makes a reappearance in 'The Missing Treaty," in which he seeks to elucidate the mystery surrounding the stolen draft of a treaty. A Russian agent, the beautiful Countess Rostov, Is suspected, and "Leathermouth" becomes involved. It is one of the most Intriguing mysteries in which that Secret Service man has yet been engaged.'
Source:
'In Review', Sunday Times, 6 May 1934, p.12.