1.   Her mind drifted and blanked, refusing her efforts to focus.

2.   Her mind was drifting on the waves of her pain.

3.   His mind drifted away on the tides of the kif, and then floated back.

4.   Morse was conscious that his mind was drifting off into an interesting avenue of thought, but also that he was drifting off to sleep, as well.

5.   His mind drifted over the people whom he had heard about for the first time that morning, groping for some sort of perspective.

6.   Frowning, she let her mind drift back to the events of two years ago.

7.   His hands were automatically driving, but his mind was drifting elsewhere.

8.   As he waits, his mind drifts to his pregnant daughter, or to his wife, Beverly, or to other grown children and stepchildren.