mystery to the boys themselves, had been stolen.

Putting two and two together, Frank had made up his mind that the Jap
whose case Billy had been assigned to investigate was none other than
Oyama himself, and as they entered the space described above his eyes
eagerly swept the row of prisoners seated in the "Pen."

"I was sure of it," the boy exclaimed as his eyes encountered an
abject, huddled-up figure seated next a ragged, besotted-looking
tramp.

"Sure of what?" demanded Harry.

"Why, that Oyama was the man who stole the papers from the Southern
Cross."

"Well?"

"Well, there he is now."

Frank indicated the abject object in the corner who at the same moment
raised a yellow face and bloodshot eyes and gazed blearily at him.
There was no sign of recognition in the face, however. In fact the Jap
appeared to be in a stupor of some sort.

"Is that little Jap known to you?"

Frank turned: a gray moustached man with a red face and keen eyes was
regarding him and had put the question.