“I can’t shoot him in cold blood!” protested the professor.

Slowly Everard moved up from the other side. In a moment the test must have come, when a sound between a gasp and a moan turned every face toward Johnston.

“Great God of Wonders!” whispered the old man, and pointed in the face of the glowing moon. One after another the little group turned, caught the vision, and were stricken motionless.

Far in the radiant void, at a distance immeasurable to the estimate, soared terrifically an unknown creature. Its wings, spreading over a huge expanse, bore up with unimaginable lightness a bloated and misshapen body. From a neck that writhed hideously, as a serpent in pain, wavered a knobbed head, terminating in a great bladed beak. With slow sweep it described majestic circles. Always the waving head gave the impression of hopeless search. It was like a foul and monstrous gnat buzzing in futile endeavour at the pale-lit window of the infinite. Suddenly it fell, plunging headlong, then over and over, like a tumbler pigeon, miles and miles, so it seemed, through the empty air, only to bring up with a turn that carried it just above the sea, in a ghastly and horrid playfulness.

The little human creatures far below followed with awful eyes. Not until a low-scudding cloud blotted the portent from sight did the power of speech and coherent thought return. Then, each according to his own way, they bore themselves in the face of a terror such as no creature of human kind ever before had confronted. Professor Ravenden, holding an envelope on his knee, burrowed fiercely for a pencil muttering:

“Gyrations comprising three distinct turns. Most amazing. New light upon the entire race of flying reptiles. I must preserve my calm; surely I must preserve my calm!”

Dolly Ravenden was looking at Dick with her soul in her eyes.

Old Johnston, fallen to his knees, was praying with the formal steadfastness of the blue Long Island Presbyterian.

Everard crossed to Helga, who was pale but quiet, and threw his arm around her. She leaned against him and gazed into the sky. Dick wrenched his hungry eyes from Dolly and turned a face absolutely white and absolutely set to Professor Ravenden.

“The pteranodon!” he said.