them that morning, but only the lower edge of it caught the Red Cloud, and when Tom sent her up still higher she found a comparatively quiet zone, where she slid along at good speed.
That afternoon Tom busied himself about some wires and a number of complicated pieces of apparatus which were in one corner of the main cabin.
"What are you doing now?" asked Mr. Jenks, who had been talking with Mr. Parker, and showing that scientist some of the manufactured diamonds.
"Getting our wireless apparatus in shape," answered the lad. "I should have done it before, but I had so much to do that I couldn't get at it. I'm going to send off some messages. Dad will want to know how we are doing."
As he worked away, he also made up his mind to send another message, in care of his father, for there was a receiving station in the Swift home. And to whom this message was addressed Tom did not say, but we fancy some of our readers can guess.
Finally, after several hours of work, the wireless was in shape to send and receive messages. Tom pulled over the lever, and a crackling sound was heard, as the electricity leaped from
