I supposed him to be seceretly following his own train of thought.

It took the other officers a moment to follow her train of thought.

As if he followed her train of thought, Ethan nodded.

She wasn't used to being unable to follow his train of thought.

But he had been following his own train of thought, which was running on a different track.

I failed to follow his train of thought, my mind still on the meeting with Rodriguez.

"I think we are all unhappy now," Kitty went on, still following her own little train of thought.

The best way was to let things follow their own train.

It is not hard to follow Herr's train of thought.

Then he followed her train of reasoning, and began to smile.