He owed money in Aix, money at his hotel.

We knew from the motor-car that the man we were searching for had returned to Aix.
Things began to look black for Wethermill.

Then you gave me a little piece of information." "I!" exclaimed Ricardo, with a start.
"Yes.

You told me that you walked up to the hotel with Harry Wethermill on the night of the murder and separated just before ten.

A glance into his rooms which I had--you will remember that when we had discovered the motor-car I suggested that we should go to Harry Wethermill's rooms and talk it over--that glance enabled me to see that he could very easily have got out of his room on to the verandah below and escaped from the hotel by the garden quite unseen.