When I first came to London I had bought a car and amused myself with running about the south of England, so I knew something of the geography. I took Sir Walter to town by the Bath Road and made good going. It was a soft breathless June morning, with a promise of sultriness later, but it was delicious enough swinging through the little towns with their freshly watered streets, and past the summer gardens of the Thames valley. I landed Sir Walter at his house in Queen Anne’s Gate punctually by half-past eleven. The butler was coming up by train with the luggage.

The first thing he did was to take me round to Scotland Yard. There we saw a prim gentleman, with a clean-shaven, lawyer’s face.

“I’ve brought you the Portland Place murderer,” was Sir Walter’s introduction.

The reply was a wry smile. “It would have been a welcome present, Bullivant. This, I presume, is Mr. Richard Hannay, who for some days greatly interested my department.”