Where it had come from was a minor mystery.

After that the minor mysteries crowded around, each demanding an answer.

About two hours of that and they came to a minor mystery.

A minor mystery, of course, is how the file has survived intact.

Well, that solved one minor mystery and replaced it with another.

Another minor mystery, and one probably not worth worrying over.

Harrison did not mean to waste time on this minor mystery.

The main result so far has been the beginning of scores of minor mysteries.

The young man was still a minor mystery to her, despite all the trials they were enduring together.

The man represented a minor mystery to be sometime resolved.