Morris Isaac "Moose" Charlap was an American Broadway composer best known for Peter Pan, for which Carolyn Leigh wrote the lyrics. The idea for the show came from Jerome Robbins, who planned to have a few songs by Charlap and Leigh. It evolved into a full musical, with additional songs by Jule Styne and Betty Comden and Adolph Green. The original run of Peter Pan on Broadway starred Mary Martin as Peter Pan and Cyril Ritchard as Captain Hook. From Wikipedia
