Upon the chariot beam A Janus-visaged Shadow did assume The guidance of that wonder-winged team; The shapes which drew it in thick lightnings Were lost:--I heard alone on the air's soft stream The music of their ever-moving wings.
All the four faces of that charioteer Had their eyes banded; little profit brings Speed in the van and blindness in the rear, Nor then avail the beams that quench the sun, Or that with banded eyes could pierce the sphere Of all that is, has been, or will be done.
So ill was the car guided--but it past With solemn speed majestically on.
The intense stirring of his imagination implied by this supreme poetic effort, the solitude of the Villa Magni, and the elemental fervour of Italian heat to which he recklessly exposed himself, contributed to make Shelley more than usually nervous.

His somnambulism returned, and he saw visions.

On one occasion he thought that the dead Allegra rose from the sea, and clapped her hands, and laughed, and beckoned to him.

On another he roused the whole house at night by his screams, and remained terror-frozen in the trance produced by an appalling vision.

This mood he communicated, in some measure, to his friends.