From Wikipedia

Henry Alexander MacRae (August 29, 1876 – October 2, 1944) was a Canadian film director, producer and screenwriter during the silent era, working on many film serials for Universal Studios. One of a number of Canadian pioneers in early Hollywood, MacRae was credited with many innovations in film production, including artificial light for interiors, the wind machine, double exposures and shooting at night.

Henry MacRae was born in Toronto, Ontario, Canada on August 29, 1876 and died in Beverly Hills, California, USA on October 2, 1944, aged 68.

He was active as a director from 1912 to 1933, making more than 130 films, most of them silent. In addition to the many westerns and adventure films to his credit, he directed the first Thai-Hollywood co-production, Miss Suwanna of Siam, in 1923.

His first "talkie" was the first Tarzan movie with sound, Tarzan the Tiger in 1929. He also directed several westerns starring Hoot Gibson, a Tom Mix western and movies featuring Rex the Wonder Horse.

His producer credits in the 1940s include such serial films as The Green Hornet and Flash Gordon Conquers the Universe.