as they had expected it would, but slanted upward through the great
glass mountain, running in a direction that promised to lead them to
the side opposite the Mangaboo country.

"It isn't a bad road," observed the Wizard, "and if we followed it it
might lead us to some place that is more comfortable than this black
pocket we are now in. I suppose the vegetable folk were always
afraid to enter this cavern because it is dark; but we have our
lanterns to light the way, so I propose that we start out and discover
where this tunnel in the mountain leads to."

The others agreed readily to this sensible suggestion, and at once the
boy began to harness Jim to the buggy. When all was in readiness the
three took their seats in the buggy and Jim started cautiously along
the way, Zeb driving while the Wizard and Dorothy each held a lighted
lantern so the horse could see where to go.

Sometimes the tunnel was so narrow that the wheels of the buggy grazed
the sides; then it would broaden out as wide as a street; but the
floor was usually smooth, and for a long time they travelled on
without any accident. Jim stopped sometimes to rest, for the climb
was rather steep and tiresome.

"We must be nearly as high as the six colored suns, by this time,"
said Dorothy. "I didn't know this mountain was so tall."

"We are certainly a good distance away from the Land of the Mangaboos,"
added Zeb; "for we have slanted away from it ever since we started."

But they kept steadily moving, and just as Jim was about tired out with