From just ahead of them there was a curious, regular noise.

There was a curious noise at the back of the train.

A curious clicking noise followed from the inside of the box, and both the men smiled in a satisfied way.

That's when the curious noise came to his ears.

As it swung closed, a curious hissing noise came from the hall they had left.

Soon he heard a curious noise that made him look up.

"Do you not hear a very curious noise on that side?"

Then, off toward the farther end of the valley there sounded a curious noise.

'But this knowledge of yours means you could save if world 1' The man in the chair made a curious noise.

Right at the beginning, there was a curious noise, like the tearing of silk.