“Why, that the young Englishman is Ellison.”

“Quite right, Patsy,” said Nick.

Nick thought a moment or two, and then said:

“Philadelphia is the place where you must look for a day or two. Keep your eyes open for traces of Ellison’s valet, and for the man who came to see Ellison, and in whose cape coat Ellison went away. Patsy saw them both, and that is an advantage.

“I will follow up the Rainforth matter here, but that, in my judgment, is where Ida will have to do most of the work. You can’t get away any too quickly.”

“I suppose,” said Chick, “what we’ve got to work on there is how Lannigan came to get a line on the wedding presents at Sanborn’s.”

“Of course,” said Nick, “there is a connection there with Ellison, somehow. Whether with Ellison’s knowledge or not is a question, but on working in Philadelphia on the line of Ellison’s doings, and on the line of how Lannigan was steered to the wedding, you may find out much that is valuable for us to know in tracing the mystery of Ellison’s disappearance.”

The two young detectives went away to prepare for their trip to Philadelphia.

As soon as they were gone, Nick summoned Ida.

She was not long in coming, and, when she did arrive, Nick said to her: