"They can't let Fritz do all the work," commented Don.
"Bonjour, Messieurs! On a tour of inspection, I suppose?" broke in a low voice.
An officer standing by the entrance to a dugout was regarding them smilingly.
"Yes," said Don, with an answering smile.
"Want to take a look inside?"
The officer pointed to the entrance.
"Very much indeed," declared Dunstan.
"All right. You're welcome. I'll go first; otherwise you might take a tumble."
He lowered himself into the opening and presently disappeared into the cavernous depths, and by the time Don had his feet on the rungs of the ladder an electric light, flashing up, dispelled the gloom.
The ambulanciers found that this particular dugout was about six feet square and scarcely high enough for a man to stand erect in.