Glaenzer managed the New York branch of Boussod, Valadon & Cie., which closed by early 1902. He became manager of the New York branch of Jacques Seligmann & Co., Inc., which opened in 1904.
Bibliography
1961
Seligman, Germain. Merchants of Art: 1880-1960, Eighty Years of Professional Collecting. New York, 1961:79-80, 119-120, 129, 205, 214.