More than 30 concert works were composed for Reilly, including Michael Spivakovsky's "Harmonica Concerto of 1951" and fellow Canadian Robert Farnon's "Prelude and Dance for Harmonica and Orchestra". Other pieces were composed by Reilly's accompanist James Moody, ("Little Suite for Harmonica and Small Orchestra", 1960) Matyas Seiber ("Old Scottish Air for Harmonica, Strings and Harp"), Gordon Jacob ("Five Pieces for Harmonica and Strings"), Fried Walter ("Ballade and Tarantella for Harmonica and Orchestra"), Karl Heinz-Köper ("Concerto for Harmonica and Orchestra"), Graham Whettam ("Fantasy for Harmonica and Orchestra"), Vilém Tauský ("Concertino for Harmonica and Orchestra"), Francis Ward ("Kaleidoscope for Harmonica and Orchestra"), Willem Strietman ("O bonne douce France" for Harmonica and Orchestra), Max Saunders ("Sonatina for Harmonica and Piano"), Sir George Martin ("Three American Sketches for Harmonica and Strings, and Adagietto for Harmonica and Strings"), Alan Langford ("Concertante for Harmonica and Strings"), Paul Patterson ("Propositions for Harmonica and Strings").