| Birth | 25 Apr 1828 | Aurora, Cayuga County, New York | | | |
| Residence | Abt Jun 1830 | (probably) with his parents - Buffalo, Erie County, New York | | | |
| Miscellaneous | 10 Aug 1831 | had worms but was almost recovered - Aurora, Erie County, New York | | | |
| Miscellaneous | 12 May 1836 | staying with his grandfather and Aunt Maria while his parents were on a trip - Aurora, Erie County, New York | | | |
| Residence | 2 Dec 1837 | with his grandparents while his parents were in DC - Aurora, Erie County, New York | | | |
| Residence | 13 Jan 1838 | & wrote a letter to his parents - Buffalo, Erie County, New York | | | |
| Residence | 18 Feb 1838 | wrote a letter to his parents while staying with his grandparents - Aurora, Erie County, New York | | | |
| Residence | 11 Mar 1838 | with his grandfather, attended school & received a letter from his mother - Aurora, Erie County, New York | | | |
| Residence | 22 Apr 1838 | & received a letter from his mother saying she was heading for home on Thursday - Aurora, Erie County, New York | | | |
| Miscellaneous | 26 Apr 1838 | received a letter from his father that his mother was delayed leaving by a day that was sent - Erie County, New York | | | |
| Residence | 27 May 1838 | with his mother and received a letter from his father - Buffalo, Erie County, New York | | | |
| Residence | 21 Dec 1838 | & received a letter from his father written in the House of Representatives - Buffalo, Erie County, New York | | | |
| Miscellaneous | 14 Jul 1839 | received a letter from his father and sister on their travels to Saratoga Springs - Aurora, Erie County, New York | | | |
| Miscellaneous | 6 Aug 1839 | Aurora, Erie County, New York | | | |
| Miscellaneous | 6 Aug 1839 | Aurora, Erie County, New York | | | |
| Residence | 1 Nov 1839 | and received a letter from his father - Buffalo, Erie County, New York | | | |
| Residence | 7 Dec 1839 | [probably] while his parents were in DC and received a letter from his mother - Aurora, Erie County, New York | | | |
| Residence | 1 Jun 1840 | with his mother and received a letter from his father - Buffalo, Erie County, New York | | | |
| Residence | 8 Dec 1840 | & received a letter from his father in Washington DC - Buffalo, Erie County, New York | | | |
| Residence | 10 May 1841 | & received a letter from his father - Buffalo, Erie County, New York | | | |
| Residence | 15 May 1841 | & wrote to his mother that Aunt Maria left but that Grandma and Aunt Fillmore were there - Buffalo, Erie County, New York | | | |
| Residence | Aft 15 May 1841 | & his father wrote him telling him he did not want him to go to school there but to work on the farm - Aurora, Erie County, New York | | | |
| Residence | 23 May 1841 | staying with his grandparents while his parents and sister are in Washington DC - Aurora, Erie County, New York | | | |
| Miscellaneous | 29 May 1841 | Buffalo, Erie County, New York | | | |
| Miscellaneous | 29 May 1841 | Buffalo, Erie County, New York | | | |
| Residence | 4 Jun 1841 | & received a letter from his sister - Aurora, Erie County, New York | | | |
| Residence | 4 Jun 1841 | & received a letter from his sister - Aurora, Erie County, New York | | | |
| Residence | 4 Jul 1841 | and received a letter from his mother - Aurora, Erie County, New York | | | |
| Residence | 8 Sep 1841 | Aurora, Erie County, New York | | | |
| Residence | 8 Sep 1841 | Aurora, Erie County, New York | | | |
| Residence | 11 Feb 1842 | & wrote a letter to his father that a Mr Ross will lodge at the house while his mother is in DC - Buffalo, Erie County, New York | | | |
| Residence | 29 Jun 1842 | & received a letter from his mother saying she missed him and did not want to stay in DC into August - Buffalo, Erie County, New York | | | |
| Residence | 6 Dec 1842 | & received a letter from his father - Buffalo, Erie County, New York | | | |
| Residence | 17 Feb 1843 | with his mother - Buffalo, Erie County, New York | | | |
| Residence | 9 May 1844 | & wrote to his father in NYC - Buffalo, Erie County, New York | | | |
| Residence | 23 Oct 1844 | , attended school and wrote a letter to his father - Buffalo, Erie County, New York | | | |
| Residence | 23 Oct 1844 | , attended school and wrote a letter to his father - Buffalo, Erie County, New York | | | |
| Residence | 27 Apr 1845 | & received a letter from his sister in DC - Buffalo, Erie County, New York | | | |
| Miscellaneous | 27 May 1847 | received a letter from his sister while staying with his grandparents - Aurora, Erie County, New York | | | |
| Education | 24 Sep 1847 | at Harvard Law School - Cambridge, Suffolk County, Massachusetts | | | |
| Education | 24 Sep 1847 | at law school - Cambridge, Suffolk County, Massachusetts | | | |
| Miscellaneous | 15 Jan 1848 | wrote to his sister while visiting his parents - Albany, Albany County, New York | | | |
| Miscellaneous | 6 Aug 1848 | visited with his parents staying at Rathbun hotel on Broadway - New York City, New York County, New York | | | |
| Miscellaneous | 7 Aug 1848 | with his parents on a vacation - Newport, Newport County, Rhode Island | | | |
| Miscellaneous | 20 Aug 1848 | with his mother - Newport, Newport County, Rhode Island | | | |
| Residence | 5 Apr 1849 | while attending law school and wrote to his father - Cambridge, Suffolk County, Massachusetts | | | |
| Residence | 22 Mar 1850 | and planned on taking an office on Exchange Street - Buffalo, Erie County, New York | | | |
| Occupation | 31 Jul 1850 | lawyer - Buffalo, Erie County, New York | | | |
| Miscellaneous | Abt Sep 1850 | [possibly] accompanied his Aunt Mary to her brother David's or visited her in the summer - Sandusky, Erie County, Ohio | | | |
| Occupation | 1851 | personal secretary to his father, the president of the United States - Washington, District of Columbia | | | |
| Miscellaneous | Jan 1851 | sent a draft for $70 to his Uncle David for his Aunt Mary - Washington, District of Columbia | | | |
| Miscellaneous | 19 Mar 1851 | Sandusky, Erie County, Ohio | | | |
| Residence | 18 Aug 1853 | Buffalo, Erie County, New York | | | |
| Miscellaneous | 29 Jul 1854 | went with his father to cousin's Cyrus home after the death of his sister - Moravia, Cayuga County, New York | | | |
| Miscellaneous | 29 Jul 1854 | Auburn, Cayuga County, New York | | | |
| Miscellaneous | 29 Jul 1854 | Auburn, Cayuga County, New York | | | |
| Residence | 23 Aug 1854 | returned with his father from Moravia - Buffalo, Erie County, New York | | | |
| Miscellaneous | 22 Feb 1855 | wrote to his father while staying at the Willards Hotel - Washington, District of Columbia | | | |
| Miscellaneous | 13 May 1855 | met his father - New York City, New York County, New York | | | |
| Residence | 17 May 1855 | & returned from NYC and resumed his practice - Buffalo, Erie County, New York | | | |
| Miscellaneous | Abt 1856 | Buffalo, Erie County, New York | | | |
| Miscellaneous | Abt 1856 | Buffalo, Erie County, New York | | | |
| Residence | 20 Jul 1857 | with his father - Buffalo, Erie County, New York | | | |
| Miscellaneous | 1858 | father gave him lot 69 that he purchased in 1842 - Buffalo, Erie County, New York | | | |
| Occupation | 25 Jul 1860 | lawyer - Buffalo, Erie County, New York | | | |
| Miscellaneous | 26 Dec 1865 | was given power of attorney and instructions by his father for when he and his wife were in Europe - Buffalo, Erie County, New York | | | |
| Residence | 24 Jul 1869 | & wrote to his father who was in Saratoga - Buffalo, Erie County, New York | | | |
| Occupation | 11 Jul 1870 | Clerk for the US District Court - Buffalo, Erie County, New York | | | |
| Miscellaneous | 26 Jan 1873 | wrote to his father while working on a court case - Albany, Albany County, New York | | | |
| Miscellaneous | 21 Mar 1873 | wrote to his father while he was - Utica, Herkimer County, New York | | | |
| Miscellaneous | 12 May 1873 | wrote his father while on business, arrived in the afternoon - Rochester, Monroe County, New York | | | |
| Miscellaneous | 12 May 1873 | had a visit at his office from his Cousin Charlies Harris who thought Powers father was in the South - Buffalo, Erie County, New York | | | |
| Miscellaneous | 16 May 1873 | wrote to his father while working on a court case - Rochester, Monroe County, New York | | | |
| Miscellaneous | 17 Oct 1873 | wrote to his father from the St. James Hotel at the corner of Broadway and 26th St - New York City, New York County, New York | | | |
| Miscellaneous | 24 Jan 1874 | wrote to his father - Albany, Albany County, New York | | | |
| Occupation | 2 Jun 1880 | lawyer - Buffalo, Erie County, New York | | | |
| Residence | 2 Jun 1880 | at 391 Washington - Buffalo, Erie County, New York | | | |
| Miscellaneous | Aft Aug 1881 | his step-mother left him money but the control & contents of the home to the executor George Gorham - Buffalo, Erie County, New York | | | |
| Miscellaneous | 1888 | Buffalo, Erie County, New York | | | |
| Miscellaneous | 1888 | Buffalo, Erie County, New York | | | |
| Death | 15 Nov 1889 | Buffalo, Erie County, New York | | | |