Don Hale's eyes sparkled. Hopefully and with much anticipation he awaited the lieutenant's next words, and they were exactly what he wanted to hear.
"I should be pleased to have you come along."
"Well, we'll be mighty glad to do so," cried the boy, delightedly.
"No mistake about that," chimed in Dunstan.
"Good! But I must warn you in advance that there is a very grave element of risk."
"That doesn't scare us a bit," laughed Don.
"It is settled, then. Here, let me show you." Lieutenant D'Arraing unrolled a military map and spread it out on the top of a row of bushes. Then calling the boys' attention to a numbered pencil mark on its surface, he added: "This is where our observer locates the wireless station of the Boches."
Don and Dunstan studied the map with great interest.
"How extraordinarily detailed it is!" cried the former.
"Yes; the position of every clump of trees and even of single ones is indicated—in fact such small things as hedges have not been omitted. Our game is very exacting, you know."