The red patches on Kirk's cheeks darkened.

Small patches of forestry plantation darkened the slopes of some hills.

As though thinking of the oddities triggered one of them, a patch of sky against the mountains darkened suddenly, became a window to somewhere else.

As dusk falls, a patch of sky darkens; a cloud is gathering.

Scrub grew out of the lava in gnarled clumps, and patches of moss darkened the shady side of roughened splits.

The explosive patches darkened.

An indefinite patch of moisture darkened the wood.

As he scanned for the birds, a patch of sky darkened, became a window to somewhere else.

She peered through it and saw her father on the far side of the street, breathing hard, patches of sweat darkening his gray work-shirt under the arms.

He was beaming, his jacket off and his tie loosened, a patch of sweat darkening his spine: The Candidate At Work.