"I have not, sir," Hal answered.
"Take the envelope and look at it."
Hal Overton obeyed.
"Do you think it likely, Corporal, that the writing on that envelope is a forged imitation of your own handwriting?"
"It is possible, sir, of course," Hal made frank, direct reply. "Yet, sir, I am inclined to believe that the writing is really mine."
"Hand me back the envelope. Now, go to the table over there, where you will find an envelope. Take up the pen and direct another envelope in just the words that this is addressed."
"I've done so, sir," replied Hal, a moment later.
"Now in the lower corner of the envelope write the words, 'My own writing, Overton.'"
"Yes, sir; I've done it."