Harmonica for Travellers

The harmonica is an ideal instrument for travelers. Unlike guitars, trombones, violins etc, whose mere possession creates expectations of performance, the harmonica can hide unobtrusively in a pocket. Harmonica practice can then be done almost anywhere, and in particular, during the many idle moments which occur when traveling. Indeed, an extended trip provides a great opportunity to learn an instrument, particularly for those who missed out when young. I