Not even the polyglot train crew would have allowed Arabs to trespass without her invitation.
The trouble was that Jeremy, Grim, Narayan Singh and I all rushed to her rescue at the same minute, which let the cat out of the bag.

It was Doctor Ticknor's statement in Jerusalem about not wanting to see any of us alive again if we failed to bring his wife back safe that turned the trick and caused even Grim to lose his head for a moment.

When a Sikh, two obvious Arabs and an American all rush to a woman's assistance before she calls for help, there is evidence of collusion somewhere which you could hardly expect a trained spy to overlook or fail to draw conclusions from.
It was all over in a minute.

The rascal left the compartment, muttering to himself in Arabic sotto voce.

I caught one word; but he looked so diabolically pleased with himself that it didn't really need that to stir me into action.