It was divided into three compartments.
The one forward was a general storeroom for tools, arms, ammunition, duplicate parts of the engine and similar things; the next room contained food and water enough for a long trip, and the rear compartment held the machinery.
It was a simple arrangement.
The base of each helix shaft was furnished with a powerful motor which only required an electric current to turn it.
This current was derived from a small, light dynamo, which in turn was operated by an oil engine.
The same engine and dynamo gave power to the electric lighting machine, and a large motor connected with the machinery which revolved the screw shaft.
Should the occasion require, the power could be turned into a small motor, to which the water screw was coupled, for work in the sea, if they desired to navigate the water.
Pomp was busy oiling the bearings when Frank and his companion entered the engine-room.
“Barney says everything is satisfactory, Pomp,” said Frank.
“Spec’s it am, sah,” grinned the coon. “She done buck de win’?”