| Birth | 18 Aug 1778 | Southampton, Hampshire County, Massachusetts | | | |
| Baptism | 22 Sep 1778 | at the Congregational Church, Southampton, Hampshire County, Massachusetts | | | |
| Residence | 3 Nov 1798 | Chesterfield, Hampshire County, Massachusetts | | | |
| Marriage | 4 Nov 1798 | Preston, New London County, Connecticut - Olivia BREWSTER | | | |
| Marriage | 2 Jun 1800 | Hart LESTER | | | |
| Residence | 30 Jun 1800 | with his family - Pittsfield, Berkshire County, Massachusetts | | | |
| Residence | 1800 | at 6 East St - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 26 Oct 1801 | had a notice in the Pittsfield Sun regarding a fire, calling on all indebted to him to settle accts - Pittsfield, Berkshire County, Massachusetts | | | |
| Religion | 25 Feb 1806 | was one of the incorporators of the Union Parish religious society - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 31 Jan 1807 | owned a shop where Butler Bement carried on his business as a gold & silversmith - Pittsfield, Berkshire County, Massachusetts | | | |
| Occupation | 21 Apr 1808 | owner of a factory that made coaches and had also recently started manufacturing firearms - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 10 Jan 1809 | was advanced $5000 for a contract for small arms with the State of New York - Albany, Albany County, New York | | | |
| Miscellaneous | 11 Jan 1809 | was a signer of a petition to the MA legislature to establish the Berkshire Woolen & Cotton Factory - Pittsfield, Berkshire County, Massachusetts | | | |
| Occupation | 1809 | a musket manufacturer - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 27 Nov 1809 | was mentioned in a letter by Gov. Tompkins that he would be in town in a day or two - Albany, Albany County, New York | | | |
| Residence | 30 Jun 1810 | with his family and several of his workers - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 8 Aug 1812 | sent a letter to Mssrs. G. & J. Townsend - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 8 Oct 1812 | manufactured arms for the state of New York that was to be delivered to the Albany Arsenal - Albany, Albany County, New York | | | |
| Affiliation | Feb 1814 | and other stockholders of PW&CF were federalists while the Housatonic Manuf. Co. was all democrats - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 19 Feb 1814 | was one of the incorporators of the Pittsfield Woolen & Cotton Factory under its new charter - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 8 Apr 1814 | was largest shareholder (held 30 shares worth $1,000 each) of the Pittsfield Woolen & Cotton Factory - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | Aft 8 Apr 1814 | was on the first Board of Directors of the Pittsfield Woolen & Cotton Factory - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 28 Apr 1814 | advertised military muskets for sale - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 3 Sep 1814 | was named in a letter by Gov. Tompkins of NY for Col Vernor to purchase muskets from him - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | Sep 1814 | sold 63 muskets to the state of New York for $13 each total $819 - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 20 Oct 1814 | he advertised for a person to build a sheep house on his Dalten farm - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | From 1815 to 1817 | did much to sustain the credit of the Pittsfield Woolen & Cotton Factory during a market downturn - Pittsfield, Berkshire County, Massachusetts | | | |
| Occupation | Bet 1816 and 1846 | secured a contract with the U.S. Govt to provide 2000 stand of arms annually | | | |
| Miscellaneous | 26 Sep 1816 | advertised for 2 or 3 apprentices for the gunsmithing business - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 27 Nov 1816 | was a manufacturer of fire arms & purchased a patent for a hay cutting machine to make & sell - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 12 Dec 1816 | had an ad in the Otsego Herald for a patented hay cutting machine - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 5 Feb 1817 | advertised for 2 or 3 apprentices in the gunsmithing trade - Pittsfield, Berkshire County, Massachusetts | | | |
| Occupation | From 1 Sep 1817 to 1 Jun 1819 | took the lease at $37/month when the Woolen & Cotton Factory was offered for lease at public auction - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 26 Jul 1818 | with his father leased the iron works where they manufactured muskets for the country - Copake Iron Works, Columbia County, New York | | | |
| Miscellaneous | 8 Oct 1818 | received award from the Berkshire Agricultural society for a Silver-mounted Musket and Straw Cutter - Stockbridge, Berkshire County, Massachusetts | | | |
| Miscellaneous | 24 Feb 1819 | advertised for a young man to learn to become a gunsmith in his factory - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | Mar 1819 | partnered with Josiah Pomeroy after lease for Woolen & Cotton Factory was extended for 5 years - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 18 May 1819 | was a trustee in the Female Academy - Pittsfield, Berkshire County, Massachusetts | | | |
| Residence | 10 Dec 1820 | Pittsfield, Berkshire County, Massachusetts | | | |
| Occupation | 10 Dec 1820 | owner engaged in manufactures - Pittsfield, Berkshire County, Massachusetts | | | |
| Religion | 1821 | joined the First Church of Pittsfield - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 2 Jul 1822 | Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 27 Feb 1823 | advertized for 100,000 brick and a Mason to lay the brick - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 13 Mar 1823 | was a trustee of the Pittsfield Female Academy - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | Abt 1825 - 1848 | was the director of the Agricultural Bank - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 6 Jan 1825 | was a guest at a dinner following the Berkshire Medical Institution's graduation - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | Abt 1827 | Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 15 Mar 1827 | advertised for carpenters & joiners to build two brick houses - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 15 Mar 1827 | was a subscriber to the Berkshire High School - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | Bef 1 Jun 1827 | and Josiah Pomeroy continued woolen factory under the style of Lemuel Pomeroy & Co. - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 2 Sep 1827 | advertised for 250,000 bricks and 100,000 bushels of chestnut coal - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | Abt 1830 | Lemuel bought out the interest of Josiah Pomeroy - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | Abt 1830 | Lemuel bought out the interest of Josiah Pomeroy - Pittsfield, Berkshire County, Massachusetts | | | |
| Residence | 30 Jun 1830 | with his family - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 1830 | purchased old Pittsfield Factory extending his & Josiah Pomeroy's real estate a mile on both sides - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 12 May 1831 | was appointed a delegate to the National Convention of Woollen Manufacturers to be held in NYC - Boston, Suffolk County, Massachusetts | | | |
| Miscellaneous | 12 May 1831 | was appointed a delegate to the National Convention of Woollen Manufacturers to be held in NYC - Boston, Suffolk County, Massachusetts | | | |
| Religion | 1832 | a member of the Congregational Church - Southampton, Hampshire County Massachusetts | | | |
| Miscellaneous | 3 Apr 1832 | helped with the building of an Episcopal Church - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 21 Nov 1832 | owned a gun factory where a worker was crushed to death when a grinding stone broke in two - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 8 Dec 1833 | submitted a claim against his Uncle Asahel Pomeroy's estate taht was rejected - Hampshire County, Massachusetts | | | |
| Religion | Jan 1835 | was dismissed from the Congregational Church in Southampton to a church - East Windsor, Berkshire County, Massachusetts | | | |
| Miscellaneous | Abt 1835 | under his firm Lemuel Pomeroy & Sons ran the old Livingston furnace - Ancram, Columbia County, New York | | | |
| Miscellaneous | 26 Jan 1836 | & others petitioned the State Legislature to start a railroad from Pittsfield to West Stockbridge - Boston, Suffolk County, Massachusetts | | | |
| Miscellaneous | Abt 1839 - 1849 | director of the Boston & Albany Railroad - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 28 Feb 1839 | was holding unpaid notes from the Western Rail-road in his office - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 2 Dec 1839 | dissolved his partnership with Josiah Pomeroy in the firm of J. Pomeroy & Co. - Pittsfield, Berkshire County, Massachusetts | | | |
| Occupation | 2 Dec 1839 | J. Pomeroy & Co. firm became a woolen mills and trade firm named L. Pomeroy & Sons - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 2 Apr 1840 | was appointed to a committee to visit Albany about completing the western line of the railroad - Pittsfield, Berkshire County, Massachusetts | | | |
| Occupation | 1840 | owner employed in manufacture or trade - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 9 Jun 1842 | was chosen as a director for the Albany & West Stockbridge Railroad - Albany, Albany County, New York | | | |
| Miscellaneous | 13 Oct 1842 | was awarded in the agriculture report, best 8 rowed corn - Pittsfield, Berkshire County, Massachusetts | | | |
| Will | 29 Jan 1844 | Pittsfield, Berkshire County, Massachusetts | | | |
| Residence | 28 Mar 1844 | and a selectman - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 30 May 1844 | attended a meeting about the arrangements for the county jubilee - Pittsfield, Berkshire County, Massachusetts | | | |
| Residence | 26 Dec 1844 | Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 1845 | established a new furnace with his sons - Copake, Columbia County, New York | | | |
| Miscellaneous | 6 Nov 1845 | allowed the use of rooms for the meetings of the Teachers Institute - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 1846 | built a new furnace that was completed and first operation was - Copake, Columbia County, New York | | | |
| Miscellaneous | 1846 | built a new furnace that was completed and first operation was - Copake, Columbia County, New York | | | |
| Miscellaneous | 11 Oct 1846 | had a factory in Pontoogue village 2 miles from Pittsfield that was destroy by fire; damages $25,000 - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 15 Oct 1846 | submitted pieces of cutlery from his Water Shop to a committee for inspection - Pittsfield, Berkshire County, Massachusetts | | | |
| Death | 25 Aug 1849 | Pittsfield, Berkshire County, Massachusetts | | | |
| Burial | 28 Aug 1849 | Pittsfield Cemetery - Pittsfield, Berkshire County, Massachusetts | | | |
| Probate | 2 Oct 1849 | Pittsford, Berkshire County, Massachusetts | | | |
| Probate | 6 Mar 1854 | Columbia County, New York | | | |
| Miscellaneous | 9 Mar 1854 | had property that was sold after he died for $2800 - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 1 May 1862 | had a musket which was made by him found on the battlefield at Newbern NC and exhibited at a store - Pittsfield, Berkshire County, Massachusetts | | | |
| Miscellaneous | 22 Aug 2007 | has a rifle manufactured by him at the Western Reserve Historical Society History Museum - Cleveland, Cuyahoga County, Ohio | | | |