Index: Papers of John Adams, Volume 20, M
- Maastricht, Netherlands
- Mably, Gabriel Bonnot, Abbé de
- McCormick, Daniel (N.Y. merchant)
- MacCreery, William (Baltimore merchant)
- McGuire, Mr.
- Machias, Maine
- Mackay, Mungo (Boston merchant)
- McKean, Thomas (Penn. chief justice)
- MacLaine (McLane), Rev. Archibald (of the English Church at The Hague)
- Maclay, William (Penn. senator)
- MacPherson, William (of Phila.)
- Madison, James (of Va.)
- Madrid, Spain
- Maelius, Spurius (Roman nobleman)
- Mails
- Maine
- Malaysia
- Malesherbes, Chrétien Guillaume de Lamoignon de (French jurist)
- Mandrillon, Joseph (Amsterdam bookseller)
- Manning, Rev. James (of Providence, R.I.)
- Manufactures and manufacturing
- Mappa, Col. Adam Gerard (Dutch officer)
- Marblehead, Mass.
- Marchant, Henry (of Newport, R.I.)
- Marchant, Rebecca Cooke (wife of Henry)
- Marchant, William (son of Henry)
- Margaretha (Dutch merchant ship)
- Marianne (ship)
- Marie Antoinette, Queen of France
- Marietta (ship)
- Marquis de la Fayette (ship)
- Marriages
- Marsh (March), Ebenezer (of Newbury, Mass.)
- Marshall, John (Va. lawyer)
- Martinez, Como. Don Esteban José (Spanish)
- Marvell, Andrew (Brit. politician)
- Mary (ship)
- Maryland
- Maryland Journal (Baltimore)
- Mason, Elizabeth (daughter of George, Jr.)
- Mason, Elizabeth Mary Anne Barnes Hooe (wife of George, Jr.)
- Mason, George, Jr. (1753–1796, of Va.)
- Mason, George (1786–1834, son of George, Jr.)
- Mason, John (brother of George, Jr.)
- Mason, William (son of George, Jr.)
- Massachusetts
- Massachusetts Centinel (Boston)
- Massachusetts Historical Society
- Massachusetts Medical Society
- Mathematics
- Mather, Rev. Cotton (of Boston)
- Mather, Samuel, Jr. (Amer. investor)
- Mathurins (religious order)
- Matilda (Adams family servant)
- Matlack, Timothy (Penn. politician)
- Maumee River
- Maunsell, Gen. John (Brit.)
- Mayhew, Rev. Jonathan (of Boston)
- Mazzei, Philip
- Meares, John (Brit. merchant)
- Mease, James (Penn. merchant)
- Medfield, Mass.
- Medici family
- Mediterranean Sea
- Melvill, Thomas (of Boston)
- Mercy d’Argenteau, Florimond Claude, Comte (Austrian ambassador to France)
- Meredith, Samuel (treasurer of U.S.)
- Mexico
- Miami Nation
- Michaud, Joseph François (French editor)
- Middelburg, Zeeland, Netherlands
- Mifflin, Thomas (gov. of Penn.)
- Millot, Claude François Xavier
- Milton, John (Brit. author)
- Milton, Mass.
- Mining
- Minot, George Richards (Mass. historian)
- Mirabeau, Honoré Gabriel Riquetti, Comte de (French minister)
- Miranda, Francisco de (Venezuelan soldier)
- Mississippi
- Mississippi River
- Mitchell, John
- Mobs
- Mohammad ibn Uthman, Dey of Algiers
- Mohawk Nation
- Moldavia (Ottoman province)
- Money
- Monmouth, James Scott, 1st Duke of (Brit.)
- Montesquieu, Charles Louis de Secondat, Baron de La Brède et de
- Montgomery, John (brother of Robert)
- Montgomery, Robert (Irish merchant)
- Monticello (Va. estate)
- Montmorin de Saint Herem, Armand Marc, Comte de (French foreign minister)
- Moody, David (of Newbury, Mass.)
- Moody, Rev. Samuel (of York, Maine)
- Mornay, Philippe du Plessis (French author)
- Morning Star (Amer. ship)
- Morocco
- Morris, Gouverneur (U.S. merchant and diplomat)
- Morris, Mary White (wife of Robert)
- Morris, Robert, Sr. (Penn. senator)
- Morris, Col. Roger (Brit.)
- Morris, Susanna Hall Harvey Rush (mother of Benjamin Rush)
- Morse, Rev. Jedidiah (of Charlestown)
- Morton, Perez (of Braintree)
- Morton, Sarah Wentworth Apthorp (poet, wife of Perez)
- Mount Vernon (Va. estate)
- Muhlenberg, Frederick Augustus Conrad (Speaker of the House)
- Murzuq, Libya
- Music