Tom wrote a full account of what had happened and sent it to Mr. Period. He received in reply a few words, thanking him for his loyalty, and again warning him to be on his guard.
In the meanwhile, work went on rapidly on the Wizard Camera. Briefly described it was a small square box, with a lens projecting from it. Inside, however, was complicated machinery, much too complicated for me to describe. Tom Swift had put in his best work on this wonderful machine. As I have said, it could be worked by a storage battery, by ordinary electric current from a dynamo, or by hand. On top was a new kind of electric light. This was small and compact, but it threw out powerful beams. With the automatic arrangement set, and the light turned on, the camera could be left at a certain place after dark, and whatever went on in front of it would be reproduced on the moving roll of film inside.
In the morning the film could be taken out, developed, and the pictures thrown on a screen in the usual way, familiar to all who have been in a moving picture theatre. With the reproducing machines Tom had nothing to do, as they were already perfected. His task had been to make the new-style camera, and it was nearly completed.
