“Do you ever wonder what that mysterious lady is like?” asked Leslie. “I often try to picture her—from the very, very little we know about her. I think she is tall and dark and slender, and very, very stylishly dressed. She has rather sad brown eyes and is quite foreign-looking and would be very interesting to know.”

“Well, I don’t imagine her that way at all,” replied Phyllis. “To me it seems as if she must be large and imposing, with light hair and blue eyes and very quick, vivacious manners. I agree that she is no doubt dressed in a very up-to-date style, and is probably about thirty-five or forty years old. I don’t know whether I’d like to know her or not, but I would like to know what she’s after in that bungalow!”

So they continued to conjecture and imagine till Phyllis finally exclaimed: “Why, there are Father and Ted back already! Fishing must have been poor this morning. Thank goodness we got out of that place when we did! But that reminds me, I ought to go to the village and order some supplies. The grocer doesn’t come here again for two days. Don’t you want to walk down with me? It’s a gorgeous morning for a ‘hike’!”

“I believe I will,” agreed Leslie, “that is, if Aunt Marcia can get along without me. I haven’t had a good walk in so long that I fairly ache for one. I’ll go and see if Aunt Marcia would like me to get her anything, and I’ll meet you in five minutes.”

It was indeed a glorious morning for a walk. The crisp October air was as clear as crystal and the salt meadows back of the dunes were still gay with goldenrod and the deeper autumn colorings. The creek that wound through them was a ribbon of intense blue, and a thousand marsh-birds twittered and darted and swooped over its surface. But the two girls were, for once, almost blind to the beauty of it all, so absorbed were they in the never-failing topic of their mystery. And the village was reached almost before they realized they were in its vicinity.

Phyllis did her shopping first, in the general grocery store. Then Leslie suggested that they visit the little fancy-goods store and look up some wool for Miss Marcia’s knitting. It was a very tiny little store, kept by a tiny, rather sleepy old lady, who took a long time to find the articles her customers required. It seemed as if she would never, never locate the box with the right shade of wool in it!

While they were waiting, not altogether patiently, a handsome automobile drew up in front of the store. Its only occupant was a young girl scarcely older than Leslie and Phyllis, and by the ease with which she handled the car, it was plain to be seen that she was an accomplished driver. In another moment she had entered the store and was standing beside the two girls, waiting to be served.

She was short and slender in build, with a pink-and-white complexion, of marvelous clearness, and fluffy, red-brown hair. Under the heavy coat which she had unbuttoned on entering the store could be seen a stylish suit of English tweeds, very tailor-made and up-to-date, and a smart tam crowned her red-brown hair.

After the pleasant manner of the villagers and accustomed summer people, Phyllis bade her “Good morning!” But, to the astonishment of both girls, instead of replying in an equally pleasant manner, she stared at them both up and down for a moment, then turned away with only an ungracious nod. The indignant pair left her severely alone after that, except for a furtive glance or two when she was looking the other way. But when they had at last ascertained that old Mrs. Selby had, after all, no wool of the shade required, Leslie hurried Phyllis out with what seemed almost unnecessary haste.

“The little wretch!” sputtered Phyllis, once safely outside. “Did you ever see worse manners? But she’s—”