| Birth | 12 Dec 1864 | Verona, Oneida County, New York | | | |
| Residence | 27 Jun 1865 | with his parents - Constantia, Oswego County, New York | | | |
| Residence | Abt 1866 | Des Moines, Boone County, Iowa | | | |
| Residence | 10 Aug 1870 | with his father and step-mother - Delaware, Polk County, Iowa | | | |
| Graduated | 1879 | Northern Illinois Normal School - Dixon, Lee County, Illinois | | | |
| Residence | 16 Jun 1880 | with his father and step-mother - Delaware, Polk County, Iowa | | | |
| Graduated | 1880 | Iowa Agricultural College after a year - Ames, Story County, Iowa | | | |
| Residence | 1885 | with his father and step-mother - Delaware, Polk County, Iowa | | | |
| Occupation | Abt 1892 | was principal of Allen High school for 3 years - La Moille, Burear County, Illinois | | | |
| Miscellaneous | Abt 1895 | studies law in the office of H F Rhode for 3 years and became a partner - Chicago, Cook County, Illinois | | | |
| Miscellaneous | 1898 | was admitted to the bar and formed a law partnership with Judge Charles D Stillell - Illinois | | | |
| Marriage | 20 Aug 1901 | Laurene G GILMORE | | | |
| Miscellaneous | 1905 | retired from his law practice adn founded N L Blackman & Co, real estate investments - Chicago, Cook County, Illinois | | | |
| Miscellaneous | 20 May 1926 | was elected a life member of the Sons of the Revolution in perpetuity - Illinois | | | |
| Occupation | Dec 1926 | chairman of the board of Blackman, Kelley & Blackman Co, investment securities at 11 S Lasalle St - Chicago, Cook County, Illinois | | | |
| Occupation | Dec 1926 | member of the real estate firm of Blackman & Replogle - Gary, Lake County, Indiana | | | |
| Miscellaneous | Dec 1926 | was a guarantor of the Chicago Civic Opera Company - Chicago, Cook County, Illinois | | | |
| Death | 15 Jan 1944 | Chicago, Cook County, Illinois | | | |
| Burial | Aft 15 Jan 1944 | at Oak Woods Cemetery - Chicago, Cook County, Illinois | | | |