"Well, of course I've forgotten the address; but it was to some writing man—Stone, or Flint, or—"
"Steel, perhaps?"
"That's the name! David Steel, Esq. Van Sneck wanted me to take that letter, saying as it would put a spoke in Reginald Henson's wheel, but I didn't see it. A boy took the letter at last."
"Did you see an answer come back?"
"Yes, some hour or so later. Van Sneck seemed to be greatly pleased with it. He said he was going to make an evening call late that night that would cook Henson's goose. And he was what you call gassy about it: said he had told Henson plump and plain what he was going to do, and that he was not afraid of Henson or any man breathing."
Chris asked no further questions for the moment. The track was getting clearer. She had, of course, heard by this time of the letter presumedly written by David Steel to the injured man Van Sneck, which had been found in his pocket by Dr. Cross. The latter had been written most assuredly in reply to the note Merritt had just alluded to, but certainly not written by David Steel. Who, then, seeing that it was Steel's private note-paper? The more Chris thought over this the more she was puzzled. Henson could have told her, of course, but nobody else.
Doubtless, Henson had started on his present campaign with a dozen different schemes. Probably one of them called for a supply of Steel's note-paper. Somebody unknown had procured the paper, as David Steel had testimony in the form of his last quarter's account. The lad engaged by Van Sneck to carry the letter from the Continental to 15, Downend Terrace, must have been intercepted by Henson or somebody in Henson's pay and given the forged reply, a reply that actually brought Van Sneck to Steel's house on the night of the great adventure. Henson had been warned by the somewhat intoxicated Van Sneck what he was going to do, and he had prepared accordingly.
A sudden light came to Chris. Henson had found out part of their scheme. He knew that David Steel would be probably away from home on the night in question. In that case, having made certain of this, and having gained a pretty good knowledge of Steel's household habits, what easier than to enter Steel's house in his absence, wait for Van Sneck, and murder him then and there?
It was not a pretty thought, and Chris recoiled from it.
"How could Van Sneck have got into Steel's house?" she asked. "I know for a fact that Mr. Steel was not at home, and that he closed the door carefully behind him when he left the house that night."