In spite of its reasonably modern setting, India- in 1942, this adventure story seems to have earlier antecedents- Buchan, even Kipling (the natives, friendly or otherwise, are still ""wogs). Still the actual situation is a lot more immediate, and involves the sabotage of the Calcutta- Peshawar railway which- if successful- will permit Japanese infiltration and threaten British communications. Stationed there is Fraser, of Intelligence, and he is able to identify the members of a terrorist-nationalist group, a sinuous Hindu and his confederates, and spot the code called out at a tombola gaming table which keys the time and place of the bombings up the line. The story jogs along steadily for the most part and picks up real momentum at the finish, but the most that can be said for it is that it is traditional; there is no attempt to characterize Fraser over and above the stiffening of his upper lip. This writer has appeared to better effect in earlier novels and in this genre- modulated adventure.