It was after Greenbaum’s recovery, when certain things were recalled to him, that he explained what for a time had puzzled Ned and Tom. The man, who was an expert electrician, had found a means of neutralizing certain parts of the electrified fence. Hence he was able to get over, after the discovery of the planted bombs, to commit petty depredations that so annoyed Tom. It was Greenbaum, also, who provided the fash melon that had thrown Koku off his guard. As Tom had guessed, the fruit was discovered in South America by a party of travelogue movie men who brought some back with them. Greenbaum, learning of Koku’s fondness for fash, used it to play what was nearly a fatal trick on the giant. Greenbaum had also been responsible for the “warning” Eradicate brought to Tom. That was just a bluff—intended to scare Tom, but it worked the other way. The secret passage in the house on Rattlesnake Island was easily accounted for. The place had been built some years before to be used in making a certain moving picture, where a secret staircase played a part. Later the house was acquired by Mr. X and his colleagues to use as a prison and also as a meeting place for Tom. Tom suitably rewarded Bill Tagg, the tramp, and that individual had his long ardent wish fulfilled. He rode in one of Tom’s aeroplanes and received the thrill of his life. “Well, everything came out all right, didn’t it?” asked Ned of his chum as they sat in the house on Rattlesnake Island one evening after a successful day’s fishing. “Your talking pictures are making a hit.” “They seem to be,” admitted Tom modestly. “Though when Greenbaum cut the wire that night of the final test I thought everything had gone bad. But, as you say, everything came out all right, and the future looks rosy to me. I’ve got another scheme in my mind.” “Aren’t you ever going to stop?” chuckled Ned as he leaned lazily back in his chair. “Not as long as I feel as well as I do now,” replied Tom Swift. Whether he carried out his new idea or not remains to be seen. THE END =This Isn’t All!= Would you like to know what became of the good friends you have made in this book? Would you like to read other stories continuing their adventures and experiences, or other books quite as entertaining by the same author? On the _reverse side_ of the wrapper which comes with this book, you will find a wonderful list of stories which you can buy at the same store where you got this book. Don’t throw away the Wrapper _Use it as a handy catalog of the books you want some day to have. But in case you do mislay it, write to the Publishers for a complete catalog._ T H E T O M S W I F T S E R I E S By VICTOR APPLETON Author of “The Don Sturdy Series.”