Crossword-Solution: THUNDERHEADS 12 letters, 1 clue 🏆 scrabble score: 20

Half the sky was chequered with black thunderheads, but all the west was luminous and clear: in the lightning flashes it looked like deep blue water, with the sheen of moonlight on it; and the mottled part of the sky was like marble pavement, like the quay of some splendid seacoast city, doomed to destruction.

For oft are seen The giants' faces flying far along And trailing a spread of shadow; and at times The mighty mountains and mountain-sundered rocks Going before and crossing on the sun, Whereafter a monstrous beast dragging amain And leading in the other thunderheads.

And this 'tis thine To know from these examples: soon as clouds Have first begun to under-pass the sun, And, as it were, to rend the rays of light In twain, at once the lower part of them Is lost entire, and earth is overcast Where'er the thunderheads are rolled along-- So know thou mayst that things forever need A fresh replenishment of gleam and glow, And each effulgence, foremost flashed forth, Perisheth one by one.

Therefore, 'tis not exceeding strange, if oft In little time tempest and darkness cover With bulking thunderheads hanging on high The oceans and the lands, since everywhere Through all the narrow tubes of yonder ether, Yea, so to speak, through all the breathing-holes Of the great upper-world encompassing, There be for the primordial elements Exits and entrances.

Presently the thunderheads ran together into big black clouds, which melted in turn into molten masses of smoky orange, so that the heavens were like burnished brass.