“Bejabers, it’s tilegraphin’ back an’ forth they are,” he declared. “Och hone, now I wisht I cud rade whativer they be sayin’.”

The Celt watched the lights with varying emotions.

After a time they disappeared altogether. Nothing more worthy of note occurred that night.

The next morning Barney related to Frank the details of the affair.

“Indeed!” exclaimed the young inventor. “That is an important cue. No doubt the hills upon which you saw the lights are near the den of Costello.”

“Well, sor, I kin point thim out to yez,” declared Barney.

This was done, and a note of their position made.

With the coming of another day Frank decided to make a cautious attempt to enter the hills with the Steam Man.

Accordingly, steam was got up and the Man was sent along at a rapid gait toward the southern spur of the range.

It required an hour to cross the plain at this point, it being quite a long ways.