It was dark, but she needed no light for black thoughts.

But presently the black thoughts came back into his mind.

She read the black thought in my mind, and cowered away from me.

It is you who stands alone through your own black thoughts and deeds.

They were dragging me down, filling my head with black thoughts.

Why such black thoughts out here, so far from Moscow?

Seeing Burinski had brought all those black thoughts back again.

His mind was still full of heavy black thoughts.

The crow sat like a black thought on his shoulder, absolutely motionless.

But then a black thought overtook him, and slowly became a certainty.