"Yes," answered Tom, rather dubiously, "if it will be strictly straightforward and legal."

"As a representative of the United States courts, I'll take all the responsibility," Mr. Jephson pledged himself. "I know," he added, "that I haven't, really, a legal right to authorize you to go forward without signals. That right belongs to the Navy, and to revenue cutter commanders. But I'll take the responsibility upon myself, Captain Halstead. All innocent vessels proceed under regular signals, anyway, and that does away with the risk of collision."

The young motor boat captain needed no further urging. He called Joe on deck. Together the two chums worked over the fog-horn until the hail it sent forth would not carry more than a half mile.

In the meantime, Third Officer Costigan, on the bridge, had been making use of his arithmetic. Figuring that the "Victor" was twelve miles ahead of the "Panther" and still following the same course at the same speed, the third mate had to calculate the time that would elapse before the motor yacht would be just two miles astern of its quarry.

At the same time Ab Perkins was briefly busy, at least. It fell to his share to see that the power tender was all in trim for lowering over the side. Provisions and water, a compass and a fog-horn had to be added to the usual equipment of the boat. Firearms were stocked aboard, as well, and a greater supply of lines than the tender usually carried.

Meanwhile, of course, the "Panther" was traveling at increased speed, this speed being carefully regulated to fit in with the problems that Third Officer Costigan was so carefully solving.

For the next two hours Captain Tom Halstead strolled nervously about, Mr. Jephson, Mr. Baldwin, Mr. Ross and a few others were observed to be similarly afflicted with restlessness.

Just before noon Tom Halstead climbed the stairs to the bridge, consulting Mr. Costigan's figures carefully.

"Slow down the speed," Halstead ordered, after a few moments of listening that brought to them no sound showing another vessel to be near. "Mr. Perkins, stand by and lower the tender."