Lithe English writhes, twists a wreath

Middan-geard /mId.dan-yayrd/ = Middle Enclosed Region, Middle Garth, Middle Earth

Below follows excerpt from J.R.R. Tolkien's narrative poem The Lay of Leithian (an early Tale of Tinúviel) as it appears in The Lays of Beleriand in The History of Middle Earth III :

All eyes were quenched, save those that glared
in Morgoth's lowering brows, and stared
in slowly wandering wonder round,
and slow were in enchantment bound.
Their will wavered, and their fire failed,
and as beneath his brows they paled,
the Silmarils like stars were kindled
that in the reek of Earth had dwindled....

Then flaring suddenly they fell,
down, down upon the floors of hell.
The dark and mighty head was bowed;
like mountain-top beneath a cloud
the shoulders foundered, the vast form
crashed, as in overwhelming storm
huge cliffs in ruin slide and fall;
and prone lay Morgoth in his hall.
His crown there rolled upon the ground,
a wheel of thunder; then all sound
died, and a silence grew as deep
as were the heart of Earth asleep.
. . . .
....Morgoth groaned
with voice entombed, like wind that moaned
in hollow caverns penned and bound. [4086-4168]