With chilly dignity he climbed the conning-tower ladder and hailed the sailboat. Matt, Dick and the others saw him safely aboard and the boat headed shoreward, then again went below.
"I'm tired," announced Matt, cutting short a further discussion of the don and his proposition, "and I'm going to bed. You and Clackett, Gaines, will have the anchor watch till midnight. After that, call Dick and me."
"Very good, sir," replied Gaines.
Dick accompanied Matt to a room abaft the periscope chamber, in which a couple of cots had been set up, and silently the two chums turned in. Nothing more was said about going ashore to interrupt Carl's serenade. Matt knew that Dick thought he should have accepted the don's proposition, and yet, feeling that he was in the right, did not care to discuss the matter. With a hearty good night to Dick, he turned over and went to sleep.
How long Matt slept he did not know, but he was awakened by the throb of a motor and started bolt upright in his bed.
The Grampus was moving! The roll of the craft proved that she was on the surface and under way. All was dark in the little steel room, and Matt got up and groped for the switch that turned on the incandescent light. A moment later there was a dazzling glow, and Matt looked at the bulkhead doors. They had been open when he and Dick turned in, and now they were closed!
He started for the door leading to the periscope room. Just as he laid his hand on it, Dick roused up.
"What's the blooming go, mate?" queried Dick, rubbing his eyes. "We seem to be on the move."
"We are," answered Matt grimly.
"Who's in charge, and where are we going?"