Tappan, Lewis N. Pioneer in early Colorado R.M. News. Sept. 14, 1883 p.8 c.3 Real estate transfer, Tappan's add. Denver. R.M. News. iriay 2, 1874 p.4 c.2 R.M. News. June 50, 1874 p.4 c.5 Real estate transfer, East Denver. R.M. News. July 17, 1874 p.4 c.2 Real estate transfer, Tappan's add. Denver. RAAI. News. Aug. 6, 1874 p.4 c.2