Adam would ride ahead, and she could be alone with her anxious thoughts.

I had at heart a strange and anxious thought.

The pronouncement gave me food for an hour's anxious thought.

Then he prowled about, apparently in deep and anxious thought.

She went to sleep quickly, but only after a few anxious thoughts about the next morning.

He probably also spent much time in anxious thought.

Then she grew still as a sudden anxious thought occurred to her.

Bond could read every anxious thought that would be running through the man's mind.

We then see him sitting alone in his hotel room, deep in anxious thought.

Here's another anxious thought: Scientists say women are wired to worry at least more so than men.