The Three Hostages by John Buchan

I have twice heard from Turpin the story I am going to set down -- once before he understood much of it, a second time when he had got some enlightenment -- but I doubt whether to his dying day he will ever be perfectly clear about what happened to him.

I have not had time to introduce Turpin properly, and in any case I am not sure that the job is not beyond me. My liking for the French is profound, but I believe there is no race on earth which the average Briton is less qualified to comprehend. For myself, I could far more easily get inside the skin of a Boche. I knew he was as full of courage as a Berserker, pretty mad, but with that queer core of prudence which your Latin possesses and which in the long run makes his madness less dangerous than an Englishman's. He was high-strung, excitable, imaginative, and I should have said in a general way very sensitive to influences such as Medina wielded. But he was forewarned. Mary had told him the main lines of the business, and he was playing the part she had set him as dutifully as a good child. I had not done justice to his power of self-control. He saw his sweetheart leading that blind unearthly life, and it must have been torture to him to do nothing except look on. But he never attempted to wake her memory, but waited obediently till Mary gave orders, and played the part to perfection of the ordinary half-witted dancing mountebank.