“Upon my word!” exclaimed the young inventor in amazement and trepidation, “we’ve stumbled into a nice trap now, haven’t we?”

“Begorra, I should say so!” ejaculated Barney, with a grimace of comical sort.

“I done fink dat am a fac’,” assented Pomp, seriously.

“I wonder if those savages did not know it and hung back on purpose?”

A chilling thought struck Frank.

Indeed it was not impossible but that they were even now in waiting at the narrow entrance to the place.

If so it would be a nice little ambush for the Steam Horse to fall into.

One thing was sure.

The best thing to be done was to get out of that spot just as soon as possible.

Accordingly Frank at once headed the Horse for the exit.