| Birth | 2 Sep 1813 | Pittsfield, Berkshire County, Massachusetts | | | |
| Baptism | 24 Nov 1813 | Pittsfield, Berkshire County, Massachusetts | | | |
| Religion | 1832 | joined the First Church of Pittsfield - Pittsfield, Berkshire County, Massachusetts | | | |
| Education | Bef 1836 | Pittsfield Academy | | | |
| Marriage | 14 Sep 1836 | Utica, Oneida County, New York - Fanny Smith BACON | | | |
| Residence | Sep 1836 | Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 19 Dec 1839 | was mentioned in the paper settling debts for the partnership between his father and Josiah Pomeroy - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 13 Feb 1840 | advertised his house for rent on East Street - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 20 Apr 1843 | advertised a house for rent on school grounds - Pittsfield, Berkshire County, Massachusetts | | | |
| Residence | 28 Mar 1844 | and a selecteman - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 1845 | with his father and brothers built a new furnace - Copake, Columbia County, New York | | | |
| Occupation | 1 Nov 1849 | in partnership with his brothers after the death of their father in the firm L. Pomeroy's Sons - Pittsfield, Berkshire County, Massachusetts | | | |
| Occupation | | Woolen business. | | | |
| Miscellaneous | 1850 | with his brothers and brother-in-law reorganized Copake Iron Company and became the owners - Copake, Columbia County, New York | | | |
| Occupation | 20 Sep 1850 | manufacturer - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 17 Feb 1851 | petition the State house along with others to be incorporated as a mutual life insurance company - Pittsfield, Berkshire County, Massachusetts | | | |
| Residence | 17 Apr 1851 | Pittsfield, Berkshire County, Massachusetts | | | |
| Occupation | 29 Jan 1852 | one of the directors for the Pittsfield Woolen Company - Pittsfield, Berkshire County, Massachusetts | | | |
| Marriage | 7 Oct 1852 | Pine Plains, Dutchess County, New York - Mary Elizabeth "Mariah" HARRIS | | | |
| Miscellaneous | 11 Oct 1858 | and his brothers had a fire at their Satinet Mill that was quickly extinquished by the fire dept. - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 28 Jul 1859 | was chosen a board of director and to the Executive Committee of the Pittsfield Woolen Company - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 25 Aug 1859 | was a director on the board for Taconic Mills - Pittsfield, Berkshire County, Massachusetts | | | |
| Occupation | 6 Jul 1860 | manufacturer - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 1861 | , his brother Robert & brother-in-law sold Copake Iron Works to John Beckley - Copake, Columbia County, New York | | | |
| Marriage | 1 Feb 1866 | New York, New York County, New York - Laura Cornelia KNAPP | | | |
| Marriage | 1 Feb 1866 | New York, New York County, New York - Laura Cornelia KNAPP | | | |
| Residence | 2 Feb 1866 | Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 21 Nov 1867 | and others returned from a recent trip to Colorado - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 9 Apr 1868 | was appointed to a committee to devise a plan for the building of a new Town Hall - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 26 Jan 1869 | and N. G. Brown had their pockets picked on a streetcar; he lost $260 and an $8000 draft - New York City, New York County, New York | | | |
| Miscellaneous | 29 Jul 1869 | was listed with taxes in the amount of $32,580 and as Lemuel's sons in the amount of $173,998 - Pittsfield, Berkshire County, Massachusetts | | | |
| Occupation | 30 Jun 1870 | manufacturer - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 4 Jan 1872 | contributed $50,000 to the stock of Wm Turnbul & Co., a new dry goods venture | | | |
| Residence | 1877 | Massachusetts | | | |
| Occupation | 1877 | drygoods merchant [possibly] at 57 Worth - New York, New York County, New York | | | |
| Residence | Jul 1877 | and was mentioned in an article about Elihu Whittlesey, his confidential clerk for many years - Pittsfield, Berkshire County, Massachusetts | | | |
| Residence | 1878 | Massachusetts | | | |
| Occupation | 1878 | drygoods merchant [possibly] at 57 Worth - New York, New York County, New York | | | |
| Occupation | 8 Jun 1880 | woolen manufacturer - Pittsfield, Berkshire County, Massachusetts | | | |
| Residence | 9 Jun 1880 | on Clinton Ave - Pittsfield, Berkshire County, Massachusetts | | | |
| Occupation | 1880 | drygoods merchant [possibly] at 57 Worth - New York, New York County, New York | | | |
| Occupation | 1881 | dyrgoods merchant [possibly] at 57 Worth - New York, New York County, New York | | | |
| Death | 26 Sep 1881 | Pittsfield, Berkshire County, Massachusetts | | | |
| Probate | 1 Jul 1882 | Boston, Suffolk, Massachusetts, United States | | | |
| Will | | Berkshire County, Massachusetts | | | |