But I can understand if his mind did wander a little.

His mind wandered back to the old woman and her fear.

Again his mind had wandered from the test before him.

He'd learned all he could learn, and his mind was wandering now.

He began to read the story, but his mind wandered.

He didn't look like the sort of man who let his mind wander, but you never knew after all.

I knew his mind wandered back to our old days together.

He found little of interest, probably because his mind was wandering.

He let his mind wander at will over the events of the past days,.

I tried not to let my mind wander to bad places.