Stamps of the day are a series of stamps commemorating the Louisiana Purchase that were issued starting on April 21, 1904, 100 years after the purchase. First four have pix of Robert Livingstone (namesake of the town near where I grew up in NJ), Thomas Jefferson, James Monroe and William McKinley. Monroe and Livingstone negotiated the purchase; before he was assassinated McKinley approved legislation authorizing the 1904 exposition marking the 100th anniversary. #stampoftheday