It is of interest to know the locations of lamp manufacturers in order to obtain a better appreciation of lamp history in general. In 1886 the General Offices of the Sawyer-Man Electric Co. were in the Mutual Life Building, 32 Nassau Street, New York. They had a Philadelphia Office at 205 Walnut Place and their factories were listed as being at 299 Park Avenue in Brooklyn and at the Thomson- Houston Co. in Lynn, MA. The writer has a Sawyer-Man letterhead dated Feb 2, 1894 and at that time their General Offices were located at 510 West 23rd Street, New York City, and their factories were at 510-534 West 23rd Street and Duquesne Way in Pittsburgh, PA.