"Enemies of the Orcs are likely to be our friends."

"You must dig swift and deep, if you wish to hide from Orcs."

"Orcs were as keen as hounds on a scent, it was said, but they could also climb."

"It was dark, but not too dark for the night-eyes of Orcs."

"Orcs travel fast."

"Isildur was marching north along the east banks of the River, and near the Gladden Fields he was waylaid by the Orcs …"

"Those who pass the gates of Barad-dûr do not return. But I would not lead you into Moria if there were no hope of com…"

"There are older and fouler things than Orcs in the deep places of the world."

"Orcs will often pursue foes for many leagues into the plain, if they have a fallen captain to avenge."

"'The Orcs have run before us, as if the very whips of Sauron were behind them.'"