"Do they come over frequently?" It was Ralph who spoke.
"This is the first time since I have been here," replied the officer. "But we are going to change the range today," he continued, "and we need the flyers to report results."
"I am glad of that," replied Alfred.
"The commandant is very agreeably surprised at your discovery, and is hoping for good results," he said, as he moved away.
"Let's go over to headquarters," said Ralph.
"Why not go down and take a look at the machines?" suggested Alfred.
"That would be a good idea," responded Ralph, as he led the way.
Just then an officer hurriedly marched across the open space behind the guns, and, passing the guard line, moved down the hill to the left. The boys followed.
"I suppose that's where he is going," remarked Alfred.
The road made a slight turn at a point below the guard line, and one of the machines was just sighted as it passed the brow of the hill and descended the valley.