The date of André Michaux's death has been reported as both 1802 and 1803. Recently discovered archival evidence in Mauritius now confirms that 1802 is the correct date. Certain other facts about the life of André Michaux have not been reported previously. Archival evidence in France now reveals the date and place of André Michaux's marriage to Anne Cécile Claye, the dates of Anne Cécile Claye's birth and death, the location of Ann Cécile Claye's birth and death, and certain other previously unknown facts about Michaux's family.