"I couldn't help it, sir," said Sinclair. "Lord, it would take an iron man to keep from shootin' at that awful thing. Do you believe in ghosts, sir?"

"No," replied Bradley. "No such things."

"I don't know about that," said Brady. "There was a woman murdered over on the prairie near Brighton —her throat was cut from ear to ear, and—"

"Shut up," snapped Bradley.

"My grandaddy used to live down Coppington wy," said Tippet. "They were a hold ruined castle on a 'ill near by, hand at midnight they used to see pale blue lights through the windows an 'ear—"

"Will you close your hatch!" demanded Bradley. "You fools will have yourselves scared to death in a minute. Now go to sleep."

But there was little sleep in camp that night until utter exhaustion overtook the harassed men toward morning; nor was there any return of the weird creature that had set the nerves of each of them on edge.

The following forenoon the party reached the base of the barrier cliffs and for two days marched northward in an effort to discover a break in the frowning abutment that raised its rocky face almost perpendicularly above them, yet nowhere was there the slightest indication that the cliffs were scalable.

Disheartened, Bradley determined to turn back toward the fort, as he already had exceeded the time decided upon by Bowen Tyler and himself for the expedition. The cliffs for many miles had been trending in a northeasterly direction, indicating to Bradley that they were approaching the northern extremity of the island. According to the best of his calculations they had made sufficient easting during the past two days to have brought them to a point almost directly north of Fort Dinosaur and as nothing could be gained by retracing their steps along the base of the cliffs he decided to strike due south through the unexplored country between them and the fort.