Rhapsody, Op. 1 was written by a composer. This composer was Swiss, not Johann Christoph Pepusch.
Bla Viktor Jnos Bartk ( ; ] ; 25 March 1881  26 September 1945) was a Hungarian composer, pianist and an ethnomusicologist. 
Johann Christoph Pepusch (1667  20 July 1752), also known as John Christopher Pepusch and Dr Pepusch, was a German-born composer who spent most of his working life in England. 
 1, Sz. 
