There was another hunch of his shoulders.

"Dou you mean deliberately to keep me out here in this boat all night?"

"Oh, not at all!" he said easily.

"Then why did you—"

"Sorry. Can't explain."

Miss Chalmers sat down with a gasp and tried to consider the situation.

It was past midnight. The launch was slowly drifting down-stream in a steadily broadening channel. The boatman was unable to operate his engine, and had refused an offer of help. He was probably mad. She wondered if he was dangerous.

For several minutes she sat in silence, watching him as he fussed about the machinery in an amateurish fashion. Then she gritted her teeth and aroused herself to action.

"Get out of the way!" she commanded.

He moved to make a place for her, and once more she knelt on the greasy flooring. Very patiently, considering the state of her emotions, Miss Chalmers went over the engine again.