"How?"

"He said to the doctor within twenty minutes of drawing his last breath—'Doctor, you think I am mad. Not a bit of it, and I tell you that I have given my life to the study of prison breaking—getting out of this particular cell—and, doctor, I should have got out if the great commander death had not ordered me off by another route. As it is, I leave my work for the benefit of the first Briton who shall fall into your claws and drop into my cell, and then—mark me well—he'll profit by my work, unless he be a greater fool than you have taken me to be, and get away."

"He was very mad," said young Harkaway.

"Very."

Harry Girdwood said nothing.

* * * * *

They were alone.

Young Jack was full of deep and serious thought.

Harry Girdwood arose suddenly from his puzzle.

"Eureka!" he cried; "I have discovered it."