Willis slipped into a doorway until he had passed, then hurrying to the booking-window, explained who he was and asked to what station the last comer had booked. He was told “Selby,” and he retreated, exasperated and puzzled beyond words. What could Archer be up to?
He bought a time-table and began to study the possibilities. First he made himself clear as to the lie of the land. The main line of the great East Coast route from London to Scotland ran almost due north and south through Doncaster. Eighteen miles to the north was Selby, the next important station. At Selby a line running east and west crossed the other, leading in one direction to Leeds and the west, in the other to Hull.
About half-way between Selby and Hull, at a place called Staddlethorpe, a line branched off and ran south-westerly through Goole to Doncaster. Selby, Staddlethorpe, and Doncaster therefore formed a railway triangle, one of the sides of which, produced, led to Hull. From this it followed, as indeed the inspector had known, that passengers to and from Hull had two points of connection with the main line, either direct to Selby, or through Goole to Doncaster.
He began to study the trains. The first northwards was the 4 p.m. dining-car express from King’s Cross to Newcastle. It left Doncaster at 7.56 and reached Selby at 8.21. Would Archer travel by it? And if he did, what would be his next move?
For nearly an hour Willis sat huddled up in the corner of a seat, his eye on Archer in the distance, and his mind wrestling with the problem. For nearly an hour he racked his brains without result, then suddenly a devastating idea flashed before his consciousness, leaving him rigid with dismay. For a moment his mind refused to accept so disastrous a possibility, but as he continued to think over it he found that one puzzling and unrelated fact after another took on a different complexion from that it had formerly borne; that, moreover, it dropped into place and became part of a connected whole.
He saw now why Archer could not discuss Madeleine’s letter over the telephone, but was able to arrange in that way for the interview with Beamish. He understood why Archer, standing at his study window, had mentioned the call at eleven next morning. He realized that Benson’s amendment was probably arranged by Archer on the previous evening. He saw why the Girondin had left the Lesque without her full cargo, and why she was loading barrels at Ferriby. He knew who it was he had seen passing in the other train as his own reached Doncaster, and he grasped the reason for Archer’s visit to Selby. In a word, he saw he had been hoaxed—fooled—carefully, systematically, and at every point. While he had been congratulating himself on the completeness with which the conspirators had been walking into his net, he had in reality been caught in theirs. He had been like a child in their hands. They had evidently been watching and countering his every step.
He saw now that his tapping of the secret telephone must have been discovered, and that his enemies had used their discovery to mislead him. They must have recognized that Madeleine’s letter was inspired by himself, and read his motives in making her send it. They had then used the telephone to make him believe they were falling into his trap, while their real plans were settled in Archer’s study.
What those plans were he believed he now understood. There would be no meetings in London on the following day. The meetings were designed to bring him, Willis, to the Metropolis and keep him there. By tomorrow the gang, convinced that discovery was imminent, would be aboard the Girondin and on the high seas. They were, as he expressed it to himself, “doing a bunk.”
Therefore of necessity the Girondin would load barrelled oil to drive her to some country where Scotland Yard detectives did not flourish, and where extradition laws were of no account. Therefore she must return light, or, he suspected, empty, as there would be no time to unload. Moreover, a reason for this “lightness” must be given him, lest he should notice the ship sitting high out of the water, and suspect. And he now knew that it was really Benson that he had seen returning to Ferriby via Goole, and that Archer was doing the same via Selby.