“Lord! It’s not going to be so simple as it looks, is it?”

“It isn’t. And what’s more, we can’t afford to make any mistakes. It’s too dangerous.”

Hilliard got up and began to pace the room.

“I don’t care,” he declared savagely. “I’m going through with it now no matter what happens.”

“Oh, so am I, for the matter of that. All I say is we shall have to show a bit more intelligence this time.”

For an hour more they discussed the matter, and at last decided on a plan. On the following morning Hilliard was to go to his office, see his chief and ask for an extension of leave, then hang about and interview as many of his colleagues as possible, telling them he had been recalled, but was not now required. His chief was not very approachable, and Hilliard felt sure the subject would not be broached to him. In the evening they would go down to Hull.

This program they would have carried out, but for an unforeseen event. While Hilliard was visiting his office Merriman took the opportunity to call at his, and there learned that Edwards, his partner, had been taken ill the morning before. It appeared there was nothing seriously wrong, and Edwards expected to be back at work in three or four days, but until his return Merriman was required, and he had reluctantly to telephone the news to Hilliard. But no part of their combined holiday was lost. Hilliard by a stroke of unexpected good fortune was able to spend the same time at work, and postpone the remainder of his leave until Merriman was free. Thus it came to pass that it was not until six days later than they had intended that the two friends packed their bags for Hull.

They left King’s Cross by the 5.40 p.m. train, reaching their destination a little before eleven. There they took rooms at the George, a quiet hotel in Baker Street, close to the Paragon Station.

CHAPTER VII.
THE FERRIBY DEPOT

The two friends, eager and excited by their adventure, were early astir next morning, and after breakfast Hilliard went out and bought the best map of the city and district he could find.