The revolver was held in Mahdi's shaggy paw, pointed straight at Heeley's head, and the animal gibbered in guttural fury, snarling and showing ugly white fangs.

It was a sight to deter the boldest; it shocked Dan Heeley, the Bold Dan Heeley, who had never trembled at the sight of a living thing--when he had the drop on it--and he drew up sharply and recoiled a step.
Then he swore a big black oath, and his right hand went to his hip.

It was an unwise action; the Missing Link anticipated the evil intention and fired.

A second revolver fell from Mr.Heeley's right hand.

Dan's shooting arm was broken.
The Missing Link advanced with movements and howls significant of horrible ferocity.