As she started to leave the room to get some dry clothing for Bob Guess, who was soaking wet, there was a noise and some excitement out in the yard. Then Nan caught the sound of a voice she well knew.

"Oh, it's Flossie!" she cried. "It's Flossie! They've found them!"

Instantly there was a mad rush for the door, and a little later into the warm, comfortable farmhouse came Mr. and Mrs. Bobbsey with the missing twins—poor little wet twins, but happy for all that.

"Oh, hurray!" cried Bert, grabbing hold of Harry and dancing around the room with him. "Now everything's all right!"

"Oh, what happened to you?" asked Nan through her tears, as she kissed first Freddie and then Flossie and then both the twins at the same time.

"Well, we found them!" said Mr. Bobbsey to Uncle Daniel.

"Where?"

"On Hemlock Island, where the balloon came down. The motor-boat we got to go across the lake was also wrecked on the same island. And Flossie and Freddie started out in a rowboat to come to shore, but they got lost in the fog and had to turn back. And they heard us on the island and came to us."

"How did you get off if your motor-boat was wrecked?" asked Bert.

"Oh, Captain Craig managed to patch it up, and it got us back to the mainland. We went back to where we had started from—Captain Craig's dock—and then we came on here in my auto. Oh, what a day this has been!" exclaimed Mr. Bobbsey, sinking wearily into a chair.