1.   A father and son have disappeared without trace while on a walking expedition in the mountains.

2.   Hundreds of people disappear without trace every year.

3.   Hundreds of people disappeared without trace every year.

4.   It is a bit more surprising, however, when that dealer disappears without a trace.

5.   Just about everyone hoped they would disappear without trace when that tide ebbed and frenetic buying and selling ground to a halt.

6.   She disappeared without trace in a heavy snow storm.

7.   That way they would disappear without trace.

8.   The Kershaw Worm had disappeared without a trace.

9.   Two months later, when the researchers went back to look for the megaplume, it had disappeared without a trace.

10.   Without radio play, a record can disappear without trace.