"Can't help that," returned the man; "next train from here to Ronleigh's 5.47. And," he added, encouragingly, "she's nearly always a bit late."

The boys wandered disconsolately through the booking-office of the little country station, and halted outside to consider what was to be done.

"It's five-and-twenty past four," said Jack Vance, looking at his watch, "and it's a good six miles by road; we shall never walk it in the time."

"It's a good bit shorter by rail," mused Diggory, "if we could walk along the line. That tunnel under Arrow Hill cuts off a long round."

"We couldn't do that," said Mugford; "there are notice-boards all over the shop saying that trespassers on the railway will be prosecuted."

"Oh, bother that," cried Jack Vance, suddenly smitten with Diggory's idea. "Who cares for notice-boards? We'll go home along the line. If we trot every now and then, we shall get back in time."

"Well, we'd better walk along the road as far as that curve," said
Diggory, "and then they won't see us from the station."

The trio started off in the direction indicated, hurrying along the permanent way, hopping over the sleepers, and seeing how far they could run on one of the metals without falling off. At length they entered a cutting, the steep banks of which rose gradually until they towered high above their heads on either hand. Before long the mouth of the tunnel was reached, and, as if by mutual consent, the three friends came to a halt.

There was something forbidding about the dark, gloomy entrance—the stale, smoky smell, and the damp dripping from the roof, all tending to give it a very uninviting aspect.

"It's awfully long," said Mugford; "don't you think we'd better turn back?"