They had been absent more than a month, and they arrived at Carysfort one sunny morning in time to see the two new keepers who had been appointed in their place take their whale-boat and start fishing along the reef to the northward of the tower.

Seizing the opportunity, they promptly gained the lighthouse and climbed into the landing, dropping the trap-door fast behind them.

The new keepers, seeing the strangers in possession of the tower, hailed them lustily, and started back to inquire their business.

For answer Flanagan leaned over the railing and gazed calmly down upon them with a quizzical look.

"What d'ye want?" inquired the tall keeper, in response to a hail.

"What are you doing in that light?" asked the new keeper.

"I am the keeper, and when you address me say 'sir,'" roared the tall man in stentorian tones. "Tie that boat to the spiles and git away from here, or I'll fall on top o' ye."

But the new keepers were not made of easy stuff. They gained the lower landing, and held forth under threats and persuasion for a day and a half, when the "howler," getting tired of their proximity, began attacking them with hot water and other missiles, which he hove or dropped from the platform above.

The new keepers could not get up, but they determined that the men above should not get down, and they built a bomb-proof shelter to protect themselves until help should arrive.