some voluntaries were known as "trumpet voluntaries". these were voluntaries which had a tune which was played (with the right hand) on a stop called a “trumpet” or a “cornet”. two very famous trumpet voluntaries, often played at weddings, are the trumpet voluntary by henry purcell and the one by jeremiah clarke (which people used to think was composed by purcell). in the 18th century the composer john stanley wrote many trumpet voluntaries.