WereMaurice Elvey and Arthur Lubin both from the USA?
Arthur Lubin Arthur Lubin (July 25, 1898 – May 12, 1995) was an American film director and producer who directed several "Abbott & Costello" films, "Phantom of the Opera" (1943), the "Francis the Talking Mule" series and created the talking-horse TV series "Mister Ed". A prominent director for Universal Pictures in the 1940s and 1950s, he is perhaps best known today as the man who gave Clint Eastwood his first contract in film.
Charlie Elgar Charles Anthony Elgar (June 13, 1879, New Orleans, Louisiana – August 1973, Chicago, Illinois) was an American violinist, musician, teacher and jazz bandleader.