As we Forgive Them by William le Queux

That the precious document, or whatever it was, sewn up in the wash-leather which the dead man had so carefully guarded through all those years was now missing was, in itself, a very suspicious circumstance, while Mabel's vague but distinct apprehensions, which she either would not or could not define, now aroused my suspicions that Burton Blair had been the victim of foul play.

Immediately after leaving her I therefore drove to Bedford Row and held another consultation with Leighton, to whom I explained my grave fears.