”DENNETT, Hartley, architect; b. Saco, Me., Sept. 15. 1870; s. Roscoe G. (M.D.) and Hannah Olivia (Berry) D.; grad. Saco High Sch., 1888; B.S., Mass. Inst. Tech., 1892; B. A., Harvard, 1893; m. Boston, Jan. 20, 1900, Mary Coffin Ware. Began practice at Boston, 1897. Mem. Boston Soc. Architects, Chi Phi Fraternity. Clubs: Twentieth Century, City. Residence: Framingham, Mass. Office: 4 Joy St., Boston.”

Source:  Who’s Who in Pennsylvania, Vol. 1, by Albert Nelson Marquis, A.N. Marquis & Co., Publisher, Chicago, 1909, page 296