“Very well; then we may take it that when you arrived at the Mansion House, Mrs. Schallibaum was one of your inside passengers. It was a rather quaint situation, I think.”

“Yes, confound her! What a couple of noodles she must have thought us!”

“No doubt. And that is the one consoling feature in the case. She will have taken us for a pair of absolute greenhorns. But to continue. Of course she travelled in your omnibus to Kensington⁠—you ought to have gone inside on both occasions, so that you could see everyone who entered and examine the inside passengers; she will have followed you to Endsley Gardens and probably noted the house you went to. Thence she will have followed you to the restaurant and may even have lunched there.”

“It is quite possible,” said I. “There were two rooms and they were filled principally with women.”