of an unintentional morphine overdose. He was interred at Mount Pleasant Cemetery in Newark. See also List of governors of New Jersey Notes References Sources New Jersey Historical Commission biography for William Pennington New Jersey Governor William Pennington, National Governors Association William Pennington biography from The Political Graveyard 1796 births 1862 deaths Governors of New Jersey Burials at Mount Pleasant Cemetery (Newark, New Jersey) Republican Party members of the New Jersey General Assembly New Jersey lawyers Politicians from Newark, New Jersey Princeton University alumni Speakers of the United States House of Representatives American Presbyterians New Jersey Whigs Republican Party members of the United States House of Representatives from New Jersey Whig Party state governors of the United States 19th-century American politicians Lawyers from Newark, New Jersey Drug-related deaths in New Jersey 19th-century American lawyers