He was restrained only by seeing that Helen, moved by an instinct of self-preservation, had made an effort to save herself by gliding round the trunk of the tree, and seeking concealment on its opposite side.

At the same time she had prudently ceased her cries; and as the animal did not show any intention of following her, but rather seemed inclined to keep toward the edge of the lake, the boy bethought him that his best course would be not to discharge his musket until the ape should make some hostile demonstration.
Saloo had told them that the brute is not always disposed to commence the attack upon man.

If left alone, it will go its own way, except during certain seasons, when the females are fearful for their young offspring.

Then they will assail every intruder that comes near, whether man or animal.

But when wounded or enraged they will not only act on the defensive, but attack their enemies in the most spiteful and implacable manner.
Remembering these things, and hoping the huge creature might take a peaceful departure from the place, Henry, who had already held his musket at the level, lowered its muzzle, at the same time dropping upon his knees among some tall grass, which, in this attitude, tolerably well concealed him.
He soon saw that he had acted wisely.