Various continental composers wrote in a similar vein, but all called their work canons. The most prolific was Michael Haydn, whose work remained unpublished until very recently. He encouraged his neighbours in Salzburg, the Mozarts, to sing and write canons, and several by Wolfgang are extant, including two MS originals in BL. Likewise Michael's brother Joseph wrote some amusing pieces including Crab Canons that can be sung upside down (and thus back to front) at the same time as forwards. Some surprisingly jocular pieces exist from the hand of Ludwig van Beethoven, all of which have been published. Even so, the idea of a group meeting regularly seems not to have taken root as it did in Britain.