| 1773 June 25 |
Born on his fathers plantation near Bayou Sara. Son of George and Angelica Monsanto Urquhart. |
| 1779 |
George Urquhart dies and his widow marries Robert Dow a physician from New Orleans and the family moves to the city. |
| 1804 |
Marries Caroline Trudeau, the daughter of Charles Laveau Trudeau. They have five children. Thomas establishes a mercantile business with his younger brother David. Having achieved a Captain's license he often took the firm's ships to Europe. |
| 1806 |
Thomas is elected to the Board of Directors of the Bank of Louisiana, the New Orleans Insurance Company and the New Orleans Navigation Company. He is later the president of both the Bank of Louisiana and the New Orleans Insurance Company. |
| 1803 |
With the establishment of the Territory of Orleans Thomas becomes active politically, always in support of Governor Claiborne. |
| 1807-1810 |
Speaker of the Territorial house. Wardden of the Port of New Orleans. |
| 1810 |
Appointed to the territorial legislative council by Claiborne |
| 1811-1812 |
Member of the first Constitutional Convention, voting to include the West Florida Parishes. |
| 1815 |
Serves as a member of the 7th Company of InfantrySecond Regiment of the Louisiana Militia. |
| 1828 |
President of the Friends of the Administration organized in Baton Rouge to re-elect John Quincy Adams who loses the presidency to Andrew Jackson. He has also served one term as the president of the Chamber of Commerce, Grand Master of Parfat Union #21, a French-speaking Masonic Lodge.; member of the Board of Directors and a pew holder at Christ Church (Episcopal) |
| 1836 |
Member of a committee to raise money for business victims of a large fire in New York City. |
| 1841 April 6 |
Dies in New Orleans. |