Original: He did not return to the Royal Opera House to conduct opera again until 1954 , with Walton 's Troilus and Cressida , The Times obituary notice , 4 October 1967 , p. 12 although he did conduct the incidental music for a dramatisation of Pilgrim 's Progress given at the Royal Opera House in 1948 .
Simplified: He did not often conduct opera , but he did conduct at the Royal Opera House : in 1936 with Gustave Charpentier 's opera Louise in 1936 and in 1954 the first performance of Walton 's Troilus and Cressida .