For Texans in the 1840s the dominant source was the King James Bible itself. Most English-speaking Protestant settlers—whether from the southern states, Scotch-Irish stock, or recent immigrants—would have heard or read Job 39:19–25 repeatedly in family worship, public reading, or sermons. The language was already part of the common stock.
The most familiar wording was therefore the Authorized Version:
Hast thou given the horse strength?
hast thou clothed his neck with thunder?
Canst thou make him afraid as a grasshopper?
the glory of his nostrils is terrible.
He paweth in the valley, and rejoiceth in his strength:
he goeth on to meet the armed men.
He mocketh at fear, and is not affrighted;
neither turneth he back from the sword.
The quiver rattleth against him,
the glittering spear and the shield.
He swalloweth the ground with fierceness and rage:
neither believeth he that it is the sound of the trumpet.
He saith among the trumpets, Ha, ha;
and he smelleth the battle afar off,
the thunder of the captains, and the shouting.
These lines (especially "clothed his neck with thunder," "mocketh at fear," "smelleth the battle afar off," and the "Ha, ha") were the ones most often echoed.
Matthew Henry's commentary was the most widely owned and consulted non-biblical text among ministers and the better-read laity. Henry's remarks on the passage were standard and frequently drawn upon. Characteristic phrases a Texan preacher or educated settler might have absorbed include:
• The horse is "the horse that is prepared against the day of battle," a creature of strength and spirit that man did not give him.
• "He mocks at fear, and makes a jest of it"; he will not retreat from the sword or the rattling quiver.
• The description explains the character of "presumptuous sinners": "Every one turneth to his course, as the horse rusheth into the battle" (linking it to Jeremiah 8:6). When a man's heart is fully set on evil, "there is no making him afraid."
• God "delights not in the strength of the horse" (Psalm 147:10) and has said "a horse is a vain thing for safety" (Psalm 33:17)—a useful caution alongside the praise of the animal's courage.
Henry's language was more widely available in the American South and West than most literary criticism.
Carlyle by 1840?
Thomas Carlyle was already known among the American literary and intellectual elite, especially in New England. Emerson had promoted Sartor Resartus (American edition 1836) and The French Revolution (1837); by the late 1830s Carlyle had a serious following among educated readers in Boston and beyond. His later fame was still growing, but he was not obscure.
In the Texas of the 1840s, however, that knowledge was limited. The population was still small, heavily frontier, and more oriented toward practical concerns, revival religion, and the Bible than toward British literary fashion. A well-educated minister, lawyer, or newspaper editor in Houston, Austin, or San Antonio might have encountered Carlyle's name or a review, but the average settler, ranger, or planter would not. Carlyle's specific praise of the Job horse (the "neck with thunder" metaphor) was not yet part of common American rhetoric the way the KJV text and Henry were.
Summary for the period
A literate or church-going Texan in the 1840s was most likely to know the King James wording of Job 39:19–25 itself, and secondarily the moral and typological applications found in Matthew Henry (courage that mocks fear; the warning against trusting in horses; the parallel to the headlong sinner). More literary or Transcendentalist appropriations (Carlyle and the New England circles) existed but were peripheral on the Texas frontier.
DOC:
Okay, no Carlyle yet but a Methodist preacher among the militia would draw on Henry to show his erudition to his men who would probably know the KJV language themselves. Wonder if a Methodist minister, or even a lay preacher, ever served as a ranger or militia officer? Give me a rousing speech by a Texan leader to his men preparing to attack a Comanche force, drawing on that imagery.
GROK
Yes. Methodist circuit riders and local preachers on the Texas frontier routinely carried arms and sometimes held militia or ranging commissions. John Wesley Kenney, an early Methodist preacher in Texas, had already served as a militia captain in the Black Hawk War and later in the Texas army during the Revolution. Hugh Martin Childress ("the Bear Hunting Preacher") served as a first lieutenant in a volunteer militia company and in the Ranger Corps of Mounted Riflemen; he later rode circuits with a shotgun and revolver within reach. Andrew Jackson "Fightin' Jack" Potter, a Methodist circuit rider of the next generation, was an Indian fighter and scout who kept pistols handy even in the pulpit. On the 1840s frontier the line between preacher, settler, and militia officer was thin; a Methodist minister or licensed lay exhorter riding with a ranging company was not exceptional.
Here is a speech such a man might have given to a militia or ranger company preparing to strike a Comanche force. It uses the King James language the men already knew and the moral and martial applications found in Matthew Henry, delivered in the elevated yet practical style of a frontier Methodist.
________________________________________
Men of the company—
We have ridden far, and the tracks are fresh. Before the sun is high we will be among them. Some of you have seen what they leave behind—a cabin burned, horses taken, and worse. You know why we are here.
The Book of Job speaks of the war-horse. "Hast thou given the horse strength? hast thou clothed his neck with thunder?" The horse did not make himself. God gave him that neck, that strength, that terrible glory of the nostrils. And when the trumpet sounds he does not hang back. "He paweth in the valley, and rejoiceth in his strength: he goeth on to meet the armed men. He mocketh at fear, and is not affrighted; neither turneth he back from the sword." The quiver rattles, the spear glitters, and still he swallows the ground with fierceness. "He saith among the trumpets, Ha, ha; and he smelleth the battle afar off, the thunder of the captains, and the shouting."
That is the spirit the Lord has set before us. Not the spirit of the man who trusts in the strength of the horse alone—for the Scripture also says a horse is a vain thing for safety—but the spirit of those who know the strength is given, and who therefore go forward without flinching. Henry says of that horse that he mocks at fear and makes a jest of it; slash at him, rattle the quiver, and he will not retreat, but press on and even put courage into his rider. So let it be with us this day.
The Comanche is bold on the plain. He hangs off the side of his pony and shoots from under its neck. He has learned the horse as few men have. But he is still a man, and his horse is still a creature. We do not meet him with our own courage only. We meet him with the strength the Lord has given—in these horses that have carried us this far, in these rifles and pistols, and in the right of defending the people who look to us. Let every man keep his place. When the order comes, go as that horse goes: not driven, but willing; not looking back, but scenting the fight and rejoicing to meet it.
Remember also what the same Scripture warns. The horse that rushes headlong is the picture of the presumptuous sinner who will not be turned. Let none of us be that man. We fight because the settlements must stand, not because our hearts are set on blood for its own sake. Do your duty cleanly, spare the women and the little ones, and when the work is done we will give thanks to the God who clothes the neck with thunder and who has brought us safe thus far.
Look to your girths. Look to your loads. When I raise my hand, we ride.
God keep you. Now—mount.