There was just an instant in which to decide and act, but in that instant he raised his rifle and fired. Perhaps it was a wonderful bit of marksmanship, or perhaps it was just luck, but the bullet struck the Gorobor in the spine and a moment later its hind legs collapsed and it rolled over on its side, pitching Jana and the Horib heavily to the ground. Simultaneously Tarzan's mount swept by and the ape-man, risking a bad fall, slipped from its back to go tumbling head over heels against the carcass of the Horib's mount.
Leaping to his feet, he faced the lizard-man and as he did so the ground gave way beneath him and he dropped suddenly into a hole, almost to his armpits. As he was struggling to extricate himself something seized him by the ankles and dragged him downward—cold fingers that clung relentlessly to him dragging him into a dark, subterranean hole.
XVI
ESCAPE
The O-220 cruised slowly above the Gyor Cors, watchful eyes scanning the ground below, but the only living things they saw were huge dinosaurs. Disturbed by the motors of the dirigible, the great beasts trotted angrily about in circles and occasionally an individual, sighting the ship above him, would gallop after it, bellowing angrily, or again one might charge the elliptical shadow that moved along the ground directly beneath the O-220.
"Sweet tempered little fellows," remarked Lieutenant Hines, who had been watching them from a messroom port.
"Jes' which am dem bad dreams, Lieutenant?" asked Robert Jones.
"Triceratops," replied the officer.
"Ah'll try most anything once, suh, but not dem babies," replied Robert.
Unknown to the bewildered navigating officer, the ship was taking a southeasterly course. Far away, on its port side, loomed a range of mountains, hazily visible in the up-curving distance, and now a river cut the plain—a river that came down from the distant mountains—and this they followed, knowing that men lost in a strange country are prone to follow the course of a river, if they are so fortunate as to find one.