Toronto Symphony Orchestra horn section 1951-52. Left to right: Reg Barrow, Leonard Hale, Sir Ernest MacMillan (conductor), Clifford Spearing, Ken Godwin and (seated) Mary Barrow For a while in the 1940s, Mary was 1st horn, making her one of the first women principal horns in North America. She played the North American premiere of the Britten Serenade.