Matt listened. It was marvelous how completely he was in touch with the engine.
"Did you strain the gasoline before you put it into the tank?" he demanded of Clackett.
"Always do that, Matt," was the reply.
"The carburetter valve is clogged. Lay hold here."
In ten minutes the valve was clear, the engine "turned over" and the motor working properly. Matt switched the power into the propeller.
"All right, periscope room!" he called through a tube.
"Bully!" came back the voice of Gaines. "We were almost on the rocks. You're the boy, Matt!"
"Send Dick Ferral down here," ordered Matt curtly.
Dick presently appeared.
"Take charge of the engine, Dick," said Matt.