"Do you mean to say you don't know that what the people hereabouts call the Bottomless Pit is situated right off that point—the most dangerous spot along the whole coast?"

"No, I didn't," said Katherine, horrified. She remembered now that Aunt Elizabeth had warned her to be careful of some bad hole along shore, but she had not been paying much attention and had supposed it to be in quite another direction. "I am a stranger here."

"Well, I hardly thought you'd be foolish enough to be out there if you knew," said the other in mollified accents. "The place ought not to be left without warning, anyhow. It is the most careless thing I ever heard of. There is a big hole right off that point and nobody has ever been able to find the bottom of it. A person who got into it would never be heard of again. The rocks there form an eddy that sucks everything right down."

"I am very grateful to you for calling me in," said Katherine humbly. "I had no idea I was in such danger."

"You have a very fine bunch of seaweeds, I see," said the unknown.

But Katherine was in no mood to converse on seaweeds. She suddenly realized what she must look like—bare feet, draggled skirts, dripping arms. And this creature whom she had taken for a lunatic was undoubtedly a gentleman. Oh, if he would only go and give her a chance to put on her shoes and stockings!

Nothing seemed further from his intentions. When Katherine had picked up the aforesaid articles and turned homeward, he walked beside her, still discoursing on seaweeds as eloquently as if he were commonly accustomed to walking with barefooted young women. In spite of herself, Katherine couldn't help listening to him, for he managed to invest seaweeds with an absorbing interest. She finally decided that as he didn't seem to mind her bare feet, she wouldn't either.

He knew so much about seaweeds that Katherine felt decidedly amateurish beside him. He looked over her specimens and pointed out the valuable ones. He explained the best method of preserving and mounting them, and told her of other and less dangerous places along the shore where she might get some new varieties.

When they came in sight of Harbour Hill, Katherine began to wonder what on earth she would do with him. It wasn't exactly permissible to snub a man who had practically saved your life, but, on the other hand, the prospect of walking through the principal street of Harbour Hill barefooted and escorted by a scholarly looking gentleman discoursing on seaweeds was not to be calmly contemplated.

The unknown cut the Gordian knot himself. He said that he must really go back or he would be late for dinner, lifted his hat politely, and departed. Katherine waited until he was out of sight, then sat down on the sand and put on her shoes and stockings.