Carrying their heavy packs and engineering implements as best they could, the engineers hurried along through the wood at Dave’s heels. The young sergeant was headed for a small hill, to one side of which was something of a cliff that he thought might offer at least slight protection from the on-coming storm. He had visited the cliff some days before, and had noticed that there was more or less of a hollow beneath it, a hollow screened by a number of trees and some dense underbrush.

As they advanced, Dave could not but think of his chum, Roger Morr.

“He should have kept close to us,” said Dave to Ben. “There is no use in taking chances by straying away in such a dangerous locality as this.”

“Maybe Roger was hit by a stray bullet and we never knew it,” was the reply. “You know every once in a while some poor fellow is knocked out that way.”

“Oh, don’t say that, Ben!” answered Dave, and then he became exceedingly thoughtful. Roger was engaged to Dave’s sister, and what would Laura say if the young civil engineer should be thus laid low?

The engineers came in sight of the cliff just as the first big drops of the on-coming storm came beating down on the leaves. Without hesitation, Dave led the way through some heavy underbrush until the foot of the cliff was gained.

“Well, this is some shelter, but not a great deal,” remarked Shadow.

“Better than being out there in the open,” returned Buster.

He had scarcely spoken when there came a vivid flash of lightning, followed by a deafening crash of thunder. Then came another crash not a great distance away.

“Gee! that lightning struck a tree pretty close to us!” gasped one of the engineers.