"I'm learning," he said. "It runs along under the gunwale on the port side, I think. I never paid much attention, but—"

"Hold the lantern here," she ordered, now on her hands and knees, with her head poked under the gunwale.

The boatman obeyed.

"Now move forward," she directed.

He moved the lantern as she directed, while Miss Chalmers explored the gas-line, beginning at the carbureter.

Presently they arrived at an obstacle in the shape of the passenger's baggage.

"Move that grip," was her next order.

He yanked the rescued bag from its place of safety, and she craned her head into the opening. A few seconds later she withdrew it and bestowed upon the boatman a look of unutterable contempt.

"Get down here," she said.

He knelt beside her.