from
The Lord of the Rings, 'The Shadow of the Past':
Trolls were abroad, no longer dull-witted, but cunning and armed with dreadful
weapons.
from The Lord of the Rings, 'The Black Gate Opens':
But through them there came striding up, roaring like beasts, a great company of hill-trolls out of
Gorgoroth. Taller and broader than Men they were, and they were clad only in close-fitting mesh of horny scales, or maybe that was their hideous hide; but they bore round bucklers huge and black and wielded heavy hammers in their knotted hands.
from The Lord of the Rings, 'The Field of Cormallen':
The Captains bowed their heads; and when they looked up again, behold! their enemies were flying and the power of Mordor was scattering like dust in the wind. As when death smites the swollen brooding thing that inhabits their crawling hill and holds them all in sway, ants will wander witless and purposeless and then feebly die, so the
creatures of
Sauron, orc or troll or beast spell-enslaved, ran hither and thither mindless; and some slew themselves, or cast themselves in pits, or fled wailing back to hide in holes and dark lightless
places far from hope.
from The Lord of the Rings, Appendix F:
But at the end of
the Third Age a troll-race not before seen appeared in southern
Mirkwood and in the mountain borders of Mordor. Olog-hai they were called in the
Black Speech. That Sauron bred them none doubted, though from what stock was not known. Some held that they were not Trolls but giant Orcs; but the Olog-hai were in fashion of body and mind quite unlike even the largest of Orc-kind, whom they far surpassed in size and power. Trolls they were, but filled with the evil will of their master: a fell
race, strong, agile, fierce and cunning, but harder than stone. Unlike the older race of the Twilight they could endure the Sun, so long as the will of Sauron held sway over them.