“We will help you in everything,” said D’Arbino, soothingly. “Trust in us to the end. What do you wish to do first?”

“The figure must have gone through this room. Let us descend the staircase and ask the servants if they have seen it pass.”

(Both D’Arbino and Finello remarked that he did not say her.)

They inquired down to the very courtyard. Not one of the servants had seen the Yellow Mask.

The last resource was the porter at the outer gate. They applied to him; and in answer to their questions he asserted that he had most certainly seen a lady in a yellow domino and mask drive away, about half an hour before, in a hired coach.

“Should you remember the coachman again?” asked D’Arbino.

“Perfectly; he is an old friend of mine.”

“And you know where he lives?”

“Yes; as well as I know where I do.”

“Any reward you like, if you can get somebody to mind your lodge, and can take us to that house.”