When Bruce pressed into her hand a package, and told her of its contents, tears came to her eyes—­tears of joy that her struggles were over, but also tears of thankfulness for the safe return of those who had done so much for her.

The submarine crew arrived in Seattle in due time.  There, before they separated for a long leave, which was sure to be followed by honorable discharge, five of them agreed to pool their share of the prize money to charter a craft, preferably a submarine, and go in search of the treasure city of Siberia.  There was talk, too, of an attempt to induce Bruce and Barney to join them on the expedition, as an airplane, which could be stowed in the submarine when not in use, would be of inestimable service to them.

Bruce and Barney in due time collected the reward offered for the destruction of the outlaw wireless station.

As for the Major and the Doctor, there is still much speculation in many quarters as to their identity.  And, as for myself, I am not able to add any information on the subject.

* * * * *

The solving of the mystery of the City of Gold was, at last, left to David Tower and Jarvis.  The story of this adventure will be told in the next volume of the Snell Mystery Stories for Boys series which will be entitled “Panther-Eye.”