The Complete Guide to Interpreting Your Dreams

by Stearn Robinson - Tom Corbett
If you played it, it signifies foreign travel or foreign visitors in the near future; however, if you only saw one or heard it, it predicts good business news or a welcome change of circumstances.

Ten Thousand Dream Interpretation

by Gustavus Hindman Miller
To dream of a Jew’s-harp, foretells you will experience a slight improvement in your affairs.

To play one, is a sign that you will fall in love with a stranger.

Mystic Dream Book

by Internet Archive - Anonymous
To dream you see one, indicates good news of a reconciliation.

If you play one, the news will affect business relations with an important personage.