Jimgrim by Talbot Mundy

Like most successful men of action, McGowan had a genius or choosing his assistants. If a less efficient and alert man than Lieutenant Allison had been in command of that motor-lorry with its searchlight and squad of infantry, that night would probably have been our last on earth. However, I must explain what had happened.

After listening to learn what line Chullunder Ghose would take with Bertolini, and having assured himself that copper-belly and his gang were not being troublesome, Grim left the ante-chamber and hurried for a conference with McGowan at the pyramid entrance. There he yielded to McGowan's protest that it was unsafe to neglect those visitors who had fled when Honey Foxman was shot in the back. They agreed to signal for the motor-lorry, and to do that McGowan had had to make a circuit of the pyramid, which takes time.