“Whither away, Commodore Trot?” he asked gaily.

“I don’t care, Cap’n.  It’s just fun enough to be on the water,” she answered, trailing one hand overboard.  So he rowed around by the North Promontory, where the great caves were, and much as they were enjoying the ride, they soon began to feel the heat of the sun.

“That’s Dead Man’s Cave, ’cause a skellington was found there,” observed the child as they passed a dark, yawning mouth in the cliff.  “And that’s Bumble Cave, ’cause the bumblebees make nests in the top of it.  And here’s Smuggler’s Cave, ’cause the smugglers used to hide things in it.”

She knew all the caves well, and so did Cap’n Bill.  Many of them opened just at the water’s edge, and it was possible to row their boat far into their dusky depths.

“And here’s Echo Cave,” she continued, dreamily, as they slowly moved along the coast, “and Giant’s Cave, and—­oh, Cap’n Bill!  Do you s’pose there were ever any giants in that cave?”

“‘Pears like there must o’ been, Trot, or they wouldn’t o’ named it that name,” he replied, pausing to wipe his bald head with the red handkerchief while the oars dragged in the water.

“We’ve never been into that cave, Cap’n,” she remarked, looking at the small hole in the cliff—­an archway through which the water flowed.  “Let’s go in now.”

“What for, Trot?”

“To see if there’s a giant there.”

“Hm.  Aren’t you ’fraid?”

“No, are you?  I just don’t b’lieve it’s big enough for a giant to get into.”

“Your father was in there once,” remarked Cap’n Bill, “an’ he says it’s the biggest cave on the coast, but low down.  It’s full o’ water, an’ the water’s deep down to the very bottom o’ the ocean; but the rock roof’s liable to bump your head at high tide .”

“It’s low tide now,” returned Trot.  “And how could any giant live in there if the roof is so low down?”

“Why, he couldn’t, mate.  I reckon they must have called it Giant’s Cave ‘cause it’s so big, an’ not ’cause any giant man lived there.”

“Let’s go in,” said the girl again.  “I’d like to ’splore it.”

“All right,” replied the sailor.  “It’ll be cooler in there than out here in the sun.  We won’t go very far, for when the tide turns we mightn’t get out again.”  He picked up the oars and rowed slowly toward the cave.  The black archway that marked its entrance seemed hardly big enough to admit the boat at first, but as they drew nearer, the opening became bigger.  The sea was very calm here, for the headland shielded it from the breeze.

“Look out fer your head, Trot!” cautioned Cap’n Bill as the boat glided slowly into the rocky arch.  But it was the sailor who had to duck, instead of the little girl.  Only for a moment, though.  Just beyond the opening the cave was higher, and as the boat floated into the dim interior they found themselves on quite an extensive branch of the sea.  For a time neither of them spoke and only the soft lapping of the water against the sides of the boat was heard.  A beautiful sight met the eyes of the two adventurers and held them dumb with wonder and delight.