Low-hearted

"Weary, slack-jointed, low-hearted as they were, the deadly Coast-fever fell upon them, and they shivered, and burned,and groaned,and raved, and leaped into holes, or rolled into campfires."

"A base, low-hearted wretch, as you justly call him, with all his pride of ancestry; and more an enemy to himself with regard to his present and future happiness, than to you, in the barbarous and ungrateful wrongs he has done you; […]"

"His poor countrymen, seeing his boldness, began to fetch deep sighs and groan like so many chained lions, speaking so loud that the khan as well as the four low-hearted chiefs, could hear them."