"Not until you get a dry suit on, at least," said Mr. Bobbsey with a smile. "You had better change, Freddie. You are all wet from my cup of tea." "I'll put dry things on him," offered Nan, leading the little fellow from the room. "But don't talk over any plans until I come back," she begged. "We won't," promised her mother. And while the house is settling into quietness, after the confusion of the temporary home-coming, and the upsetting of Dinah and Freddie, I will take just a few moments to tell my new readers something about the Bobbsey Twins as they have been written about in the other books of this series. There were two sets of twins, and that may seem strange until I tell you that Bert and Nan, aged about nine, formed one set, and Flossie and Freddie, aged four years younger, made up the second set. Bert and Nan were tall and slim, with dark hair and eyes, while Flossie and Freddie were fat and short, with light hair and blue eyes, making a very different appearance from the older twins. Besides the two sets of Bobbsey twins, there was Mr. Richard Bobbsey, and his wife Mary. They lived in an Eastern city called Lakeport, on Lake Metoka, where Mr. Bobbsey had a large lumber business. I might say that Dinah Johnson, and her husband Sam, also formed part of the Bobbsey household, for without Dinah to cook, and without Sam to do everything around the house, from watering the grass to putting out the ashes, I do not know how Mrs. Bobbsey would have gotten along. And then, of course, there was Snoop, the black cat, and Snap, the nice dog, who had once been in a circus, and could do many tricks. So much for the Bobbsey family. As for what they did, if you will read the first book of the series, which volume is called "The Bobbsey Twins," you will get a good idea of the many good times Flossie, Freddie, Bert and Nan had. Uncle Daniel Bobbsey, who was Mr. Bobbsey's brother, and his wife, Aunt Sarah, lived in the country at Meadow Brook Farm. They had a ten year old son, named Harry, and he and Bert were great chums whenever they were together. The Bobbsey twins often went to the country, and also to the seashore, where their Uncle William and Aunt Emily, as well as their cousin Dorothy, lived, at a place called Ocean Cliff. You may read of the fun the twins had at these places in the country and seashore books. Bert, Nan, Flossie and Freddie also had fun at school, and when they went to Snow Lodge they had what were, to them, a wonderful series of adventures, and solved a strange mystery. Their last trip had been on a houseboat. It was called the _Bluebird_, and they had voyaged down Lake Metoka to Lemby Creek, and through that to Lake Romano, where they had fine times. There was a mystery on the _Bluebird_, but Bert, and his cousin Harry, who was with him, found out what made the queer noises.