"A spy, sirr, gets mair money than a scout."

"Does he?" asks Captain Wagstaffe, smiling. "Well, I am not in a
position to say. But if he does, he earns it! Why?"

"Because if he gets catched he gets shot," volunteers a rear-rank man.

"Right. Why is he shot?"

This conundrum is too deep for the squad. The Captain has to answer it
himself.

"Because he is not in uniform, and cannot therefore be treated as an
ordinary prisoner of war. So never go scouting in your nightshirt,
Mucklewame!"

The respectable Mucklewame blushes deeply at this outrageous
suggestion, but Wagstaffe proceeds--

"Now, supposing I sent you out scouting, and you discovered that over
there--somewhere in the middle of this field"--he lays a finger on the
field in question--"there was a fold in the ground where a machine-gun
section was concealed: what would you do when you got back?"

"I would tell you, sirr," replied Private M'Micking politely.

"Tell me what?"

"That they was there, sirr."