Jefferson Timeline By cousinc Period: Dec 24, 1760 to Dec 25, 1762 Jefferson attended college of William and Mary Dec 24, 1775 Jefferson was elected in to Continental Congress Period: Jun 11, 1776 to Jun 12, 1776 When Jefferson wrote the Declaration of Independence Jun 1, 1779 Jefferson became governor of Virginia Feb 24, 1789 George Washington makes Jefferson Head of State Dec 24, 1797 Jefferson is elected Vice President under John Adams Feb 17, 1801 Jefferson was elected President Dec 24, 1803 Louisiana Purchase doubles size of United States Period: May 6, 1804 to Sep 13, 1806 Lewis and Clark expedition launched and ended by Jefferson Dec 24, 1809 Jefferson retires after his second term