Province of New Hampshire
Born on September 22, 1737, in Newington, Province of New Hampshire, British America, Pickering graduated from Harvard University in 1761 and read law. He entered private practice in Greenland, Province of New Hampshire and continued private practice in Portsmouth, Province of New Hampshire (State of New Hampshire, United States from July 4, 1776) until 1783, and later resumed private practice in Portsmouth from 1788 to 1790. He was a member of New Hampshire constitutional conventions from 1781 to 1783, and from 1791 to 1792. He was a member of the New Hampshire House of Representatives from 1783 to 1787. He was a member of the New Hampshire convention to ratify the United States Constitution in 1788. He was a member of the New Hampshire Senate and a member of the Executive Council of New Hampshire until 1790. He was President of New Hampshire (now Governor of New Hampshire) in 1790. He was Chief Justice of the New Hampshire Superior Court of Judicature from 1790 to 1795.