There was an alert readiness about Guerchard, as if he were ready to spring.

He kept within a foot of the Duke right to the front door.
The detective in charge opened it; and they went down the steps to the taxi-cab which was awaiting them.

The Duke kissed Germaine's fingers and handed her into the taxi-cab.
M.Gournay-Martin paused at the cab-door, and turned and said, with a pathetic air, "Am I never to sleep in my own house again ?" He got into the cab and drove off.
The Duke turned and came up the steps, followed by Guerchard.

In the hall he took his opera-hat and coat from the stand, and went upstairs.
Half-way up the flight he paused and said: "Where shall we wait for Lupin, M.Guerchard?
In the drawing-room, or in M.Gournay-Martin's bedroom ?" "Oh, the drawing-room," said Guerchard.

"I think it very unlikely that Lupin will look for the coronet in M.Gournay-Martin's bedroom.