René Leibowitz. One of Gerhardt's favorite productions was the 1964 release Treasury of Great Music, another 12-LP set for Reader's Digest. This featured the Royal Philharmonic Orchestra conducted by such eminent figures as Sir John Barbirolli, Sir Malcolm Sargent, Antal Doráti, Jascha Horenstein, Rudolf Kempe, Josef Krips, Charles Münch, Georges Prêtre, and Fritz Reiner. This was followed in 1966 by the album set All-Time Broadway Hit Parade, which included 120 songs from various musical productions such as Carousel, The Music Man, Guys and Dolls, My Fair Lady, Pal Joey, South Pacific and many more. The songs found on this collection were not recorded by the original artists. Many of the Reader's Digest recordings were later reissued on LP by Quintessence Records and Chesky Records; a few have been reissued on CD. Conductor The Reader's Digest projects created so much recording work that there was a need for another orchestra and conductor in London. Together with violinist and orchestral contractor Sidney Sax, Gerhardt formed an orchestra of top London orchestral and freelance musicians in 1964 for use in his recording sessions. He began to record this group in January 1964. The orchestra was incorporated as the National Philharmonic Orchestra in 1970 and Gerhardt himself conducted it in standard repertory, contemporary works, and film score music. Leopold Stokowski made some of his last recordings with this same orchestra. Gerhardt had received some training in conducting, as well as advice from Jascha Horenstein. His 1967 conducting of the so-called RCA Victor Symphony Orchestra (which was the National Philharmonic Orchestra) of Howard Hanson's Symphony No. 2 (The Romantic) garnered the praise of the composer. One particularly successful set Gerhardt conducted with the National Philharmonic Orchestra included the 14 LPs of the Classic Film Scores series for RCA, issued 1972–1978. This started with the 1972 release The Sea Hawk: The Classic Film Scores of Erich Wolfgang Korngold. The whole series was notable, especially for Gerhardt's own, extremely careful, preparation of the scores. Recordings were made in the acoustically outstanding Kingsway Hall and engineered by Kenneth Wilkinson. The producer of the series was George Korngold, the composer's son. The series continued with albums devoted to Max Steiner, Miklós Rózsa, Franz Waxman, Alfred Newman, Dimitri Tiomkin and Bernard Herrmann as well as albums devoted to music in the films of Bette Davis, Humphrey Bogart, and Errol Flynn. Numerous additional pieces were recorded but remain in the vaults.