"A wire, and it's charged. Not very heavy, but it stung me. Ned, I'll wager that this wire extends all the way around this cabin. You see it is only about a foot from the ground so that a person not knowing it was here would trip over it and probably give the alarm to the occupants of the cabin. This begins to look interesting."
"Oh, Tad, look!"
"Sh-h-h-h! Not so loud, Ned. You surely will get us into trouble."
"But look up there near the tree tops. What is it? More signals?"
"Yes, but not what you think," whispered Tad.
A faint crackling sound was borne to their ears, little crinkly darts of electricity shooting out from a point up there in the air.
"I—I don't understand it," whispered Ned.
"Wireless, Ned," answered Tad. "I looked to find something of the sort. Someone is sending."
At intervals the rhythmic squeal of the wireless would set in, then suddenly cease. Finally the message was sent, so Tad interpreted the sounds and flashes. The sending lasted all of ten minutes, then the power was shut off and silence settled over the cabin.
"Are you going to try to get into the cabin?" questioned Ned a little apprehensively.