Further words were taken out of his mouth by something that occurred just at that instant, and settled the fate of the cougar then and there.
Ding-dong Bell, whose unlucky day it seemed to be, had, in his excitement, been leaning far over the back of the tonneau, peering into the darkness at the rear of the cave. He was trying to detect the shadowy outlines of the cougar. A few seconds before Joe Hartley had said:—
"Look out, Ding-dong, or you'll go overboard."
The stuttering youth's reply had been a scornful snicker. But now, however, he craned his neck just a bit too far. His upper quarters over-balanced his stumpy legs and body, and with a howl that rivalled the cougar's, he toppled clean over the edge of the tonneau.
The floor of the cave sloped steeply toward the rear, and when Ding-dong struck it he did not stop. Instead, the momentum lent him by his fall appeared to propel him forward down the sloping floor. He yelled for help as he felt himself rapidly and involuntarily being borne toward the hidden cougar.
By some mysterious combination of misfortune, too, the carbide in the lamp, which had not been renewed since they left Santa Barbara, gave out with a flicker and a fizz at this moment. The cave was plunged into almost total darkness. Nat's heart came into his throat as he realized that if the cougar was not killed within the next few seconds, Ding-dong's life might pay the forfeit.
"Good gracious!" shouted Joe above poor Ding-dong's cries, "how are we going to see to shoot?"
"Aim at the eyes," grated out Nat earnestly, "it's our only chance."
As he spoke there came an angry snarl and a hissing snort. It mingled with a shout of alarm from Ding-dong, who had now stopped rolling, but was not yet on his feet. The she-cougar had seen his peril and had taken the opportunity to bring down at least one of her enemies.
Straight up, as if impelled by a powerful steel spring, she shot. But even as she was in mid-spring two rifles cracked, and with a convulsive struggle the great tawny body fell with a thud to the floor of the cave, clawing and scratching and uttering piercing roars and cries.