Which quotes from the passage show imagery?

The Ice Palace

by F. Scott Fitzgerald (excerpt)

It was a particularly cold night. A sudden thaw had nearly cleared the streets the day before, but now they were traversed again with a powdery wraith of loose snow that travelled in wavy lines before the feet of the wind, and filled the lower air with a fine-particled mist. There was no sky—only a dark, ominous tent that draped in the tops of the streets and was in reality a vast approaching army of snowflakes—while over it all, chilling away the comfort from the brown-and-green glow of lighted windows and muffling the steady trot of the horse pulling their sleigh, interminably washed the north wind. It was a dismal town after all, she thought, dismal.

Sometimes at night it had seemed to her as though no one lived here—they had all gone long ago—leaving lighted houses to be covered in time by tombing heaps of sleet. Oh, if there should be snow on her grave! To be beneath great piles of it all winter long, where even her headstone would be a light shadow against light shadows. Her grave—a grave that should be flower-strewn and washed with sun and rain.

She thought again of those isolated country houses that her train had passed, and of the life there the long winter through—the ceaseless glare through the windows, the crust forming on the soft drifts of snow, finally the slow cheerless melting and the harsh spring of which Roger Patton had told her. Her spring—to lose it forever—with its lilacs and the lazy sweetness it stirred in her heart. She was laying away that spring—afterward she would lay away that sweetness.

With a gradual insistence the storm broke. Sally Carrol felt a film of flakes melt quickly on her eyelashes, and Harry reached over a furry arm and drew down her complicated flannel cap. Then the small flakes came in skirmish-line, and the horse bent his neck patiently as a transparency of white appeared momentarily on his coat.

"Oh, he's cold, Harry," she said quickly.

"Who? The horse? Oh, no, he isn't. He likes it!"

After another ten minutes they turned a corner and came in sight of their destination. On a tall hill outlined in vivid glaring green against the wintry sky stood the ice palace. It was three stories in the air, with battlements and embrasures and narrow icicled windows, and the innumerable electric lights inside made a gorgeous transparency of the great central hall. Sally Carrol clutched Harry's hand under the fur robe.