 Mendelssohn 's interest in baroque music was not limited to the Bach St Matthew Passion which he had revived in 1829 . He was concerned in preparing and editing such music , whether for performance or for publication , to be as close as possible to the original intentions of the composers , including wherever possible a close study of early editions and manuscripts . This could lead him into conflict with publishers ; for instance , his edition of Handel 's oratorio Israel in Egypt for the London Handel Society ( 1845 ) evoked an often contentious correspondence , with Mendelssohn refusing for example to add dynamics where not given by Handel , or to add parts for trombones . Mendelssohn also edited a number of Bach 's works for organ , and apparently discussed with Robert Schumann the possibility of producing a complete Bach edition . 
