The Mystery on Cobbett's Island

mystery of the hidden money.
    “What did El mean by South-side?” Trixie asked Peter.
    “That’s the way the islanders speak of the Southern point of Long Island. It could be that Ethel lives any-where from Montauk to Southampton,” Peter answered.
    “Do you suppose the telephone directory would give us a lead?” suggested Brian.
    “It might if we knew Ed’s last name,” Trixie said impatiently. “Do you realize that, with all the information we’ve managed to get, we still don’t know that?”
    “I know, and it would have seemed kind of obvious if we’d asked El,” Jim added.
    “Say, wait a minute,” Trixie cried, snapping her fingers. “Di, if you were going to open up a bakeshop, what would you call it?”
    “I’d call it the Calorie Emporium,” Mart interrupted.
    “Oh, stop it, Mart. I’m serious,” Trixie said.
    “I suppose I’d call it Diana’s Bake Shoppe, just to be quaint,” Di replied. “Why?”
    “I get the idea!” said Mart gleefully. “Ethel’s Bake-shop. Am I right, Trix?”
    “Jeepers, Mart, you’re getting to be a real sleuth. Maybe we’ll have to let you into the firm.” Trixie’s eyes twinkled as she replied. “That’s exactly what I was thinking. Hurry up, Peter; let’s stop at The Moorings and look it up.”
    They nearly fell over each other in their rush to get at the directory on the hall table. Trixie took it out on the porch, and while everyone waited breathlessly, she looked in the Yellow Pages under “Bakeries—Retail.” Jim, who was leaning over her shoulder, was the first to spot the advertisement for Ethel’s Bakery. “You’re right, Trixie,” he cried. “At least, there is an Ethel. Now we’ll have to find out if she’s the one we’re looking for.”
    “Yippee!” exclaimed Mart. “Where does she live?”
    “Let’s see,” Trixie said as she read on. “ ‘Ethel’s Bakery. Mrs. Ethel Hall, proprietor. Homemade bread, rolls, and pastries. Cakes for all occasions. JU-nine-one thousand. Locust Lane, Easthampton.’ ”
    “That must be the right one,” Mart said. “Now all we lack is the thousand dollars.”
    “Oh, Trixie, if only, if only—” moaned Honey. “You’re so right,” Trixie answered. “If only we could break the secret of the chart. It must mean something. I feel so helpless, I could scream!”
    “Brian, you seem lost in thought. What’s on your mind?” Peter asked.
    “I was just wondering what kind of a game it was that Mr. C and Ed used to play,” he replied. “Isn’t there one that involves sailing or boats or something?”
    “There’s one you play with model boats, I think,” Peter answered, “but I’ve never seen it. It would be fun to try and work one out, wouldn’t it?”
    Trixie, who had been only half listening to the boys’ conversation, suddenly jumped up from the hammock and dashed into the house.
    “Now, what do you suppose has gotten into her this time?” Mart asked as he followed her inside, for even though he often teased his almost-twin to the point of distraction, he was always secretly concerned when he felt she was worried or discouraged.
    “My guess is that she’s had one of her hunches,” Jim remarked. “Wait and see. I’ll bet she’ll be right back in a minute.”
    He was right. It wasn’t long before Trixie came back, carrying the chart with her. She spread it out on the table and began to study it intently.
    “Gosh, Trix, you must know that thing by heart now,” said Mart, who had also rejoined the group. “What’s up?”
    “Jim, run in and get the letter, will you? I forgot it, and I want to look at it again. It’s on the desk in the library,” said Trixie, ignoring Mart’s question.
    “Sure thing, but you must know the letter by heart, too, Trix,” Jim said as he went into the house.
    “I know it all sounds silly, but I may have found the last piece in our puzzle, so step on it,” she said, her voice tense.
    As they were waiting for Jim to come back, Honey glanced at the chart and again hummed the six elusive notes. “I wish I could get a hunch about that little puzzler,” she said, “because I just know it has something to do with the whole thing.”
    “It’s been running through my head all week,” Mart added. “Maybe it’s from some old song that was popular in Ed’s day.”
    Jim came back with the letter and handed it to Trixie. They all watched her while she read it through once again. Then, speaking very slowly, she said, “Okay,