Until at last they coalesced,
And supreme the spectral creature lorded
In a triumph of whitest white,—
Above which intervened the night.
But above night too, like only the next,
The second of a wondrous sequence,
Reaching in rare and rarer frequence,
Till the heaven of heavens were circumflexed,
Another rainbow rose, a mightier,
Fainter, flushier and flightier,—