“Secret service!”

“What is it for?”

“I think it is a smuggling lay,” suggested Flucker, “but we shall know all in good time.”

“Smuggling!” Their countenances fell; they had hoped for something more nearly approaching the illegal.

“Maybe she has fand the herrin',” said a ten-year-old.

“Haw! haw! haw!” went the others. “She find the herrin', when there's five hundred fishermen after them baith sides the Firrth.”

The youngster was discomfited.

In fact the expedition bore no signs of fishing.

The six boats sailed at sundown, led by Flucker. He brought to on the south side of Inch Keith, and nothing happened for about an hour.

Then such boys as were awake saw two great eyes of light coming up from Granton; rattle went the chain cable, and Lord Ipsden's cutter swung at anchor in four fathom water.