. . "1807-03-12Z"^^ . "Albert Gallatin Mackey (March 12, 1807 \u2013 June 20, 1881) was an American medical doctor and author. He is best known for his writing many books and articles about freemasonry, particularly the Masonic Landmarks."@en . "Albert G. Mackey"@en . "1881-06-20Z"^^ . "1881-06-21Z"^^ . . . . "U.S. writer on freemasonry" . . "1807Z"^^ . "1881Z"^^ . "1807-03-13Z"^^ . "Mackey, Albert"@en .