And in that very moment, away behind in some courtyard of the City, a cock crowed. Shrill and clear he crowed, recking nothing of wizardry or war, welcoming only the morning that in the sky far above the shadows of death was coming with the dawn. And as if in answer there came from far away another note. Horns, horns, horns. In dark Mindolluin’s sides they dimly echoed. Great horns of the North wildly blowing. Rohan had come at last.

This is unparalleled. This gives me chills every time I read it. It may be my favorite quote in all of Tolkien’s works, except that choosing a favorite quote would be an impossible decision to make. It’s so inspiring. It’s so moving. It’s so heroic. And obviously, it’s a moment of pure eucatastrophe. Rohan had come at last.

And the moment that Pippin hears the horns of Rohan:

When the dark shadow at the Gate withdrew Gandalf still sat motionless. But Pippin rose to his feet, as if a great weight had been lifted from him; and he stood listening to the horns, and it seemed to him that they would break his heart with joy. And never in after years could he hear a horn blown in the distance without tears starting in his eyes.