Index: Papers of John Adams, Volume 20, H
- Haarlem, Netherlands
- Haddam, Conn.
- Hague, John (brother of Joseph)
- Hague, Joseph (Penn. manufacturer)
- Hague, The, Netherlands
- Hainrode, Prussia
- Hale, Sir Matthew
- Halifax, Nova Scotia
- Hall, Rev. Stephen (Castle William chaplain)
- Hall, Susanna Boylston Adams (1709–1797, mother of JA)
- Hamburg, Germany
- Hamilton, Alexander
- Hancock, John (Mass. politician)
- Hancock (packet)
- Handel, George Frideric (Brit. composer)
- Harcourt, George Simon, 2d Earl of (Brit. politician)
- Harding, Chester (artist)
- Hardy, Joseph (clerk of U.S. Treasury)
- Harmar, Brig. Gen. Josiah (U.S.)
- Harmodius (Athenian nobleman)
- Harrington, James (Brit. political writer)
- Harrison, Richard Hanson (of Alexandria, Va., and Cádiz, Spain)
- Hartford, Conn.
- Hartford County, Conn.
- Hartley, David (Brit. peace negotiator)
- Hartley, Thomas (Penn. representative)
- Harvard College
- Harvard University Press
- Hathorn, John (N.Y. representative)
- Hawaii (Sandwich Islands)
- Hawley, Joseph (Northampton, Mass., lawyer)
- Haydn, Franz Joseph (Austrian composer)
- Haywood, J. (Brit. surveyor)
- Hazard, Ebenezer (surveyor general of post office)
- Hazard, Jonathan J. (Newport, R.I., lawyer)
- Hazard (Continental vessel)
- Health and illnesses
- Heath, Maj. Gen. William (of Roxbury)
- Hebrew language
- Heineccius, Johann Gottlieb
- Helsingör (Elsinore), Denmark
- Henry IV, King of France
- Henry, Patrick (of Va.)
- Henry, Robert (Albany, N.Y., merchant)
- Henshaw, Samuel (of Milton)
- Herald of Freedom (Boston)
- Herostratus (Greek arsonist)
- Hessians
- Hichborn, Benjamin (Boston lawyer)
- Higginson, Elizabeth Perkins (wife of Stephen)
- Higginson, Stephen (of Mass.)
- Hillegas, Michael (treasurer of U.S.)
- Hiller, Joseph (Salem, Mass., port collector)
- Hippias (Athenian tyrant)
- Hispaniola
- History
- Hitchcock, Rev. Enos (of Providence, R.I.)
- Hoadly, Benjamin (bishop of Winchester)
- Hodgdon, Alexander (Mass. politician)
- Hodge, Capt. Michael (Newburyport surveyor)
- Holidays
- Holland and West Friesland (province of the Netherlands)
- Holland Land Company
- Hollis, Thomas Brand (Brit. antiquarian)
- Holyoke, Dr. Edward Augustus (former pres. of Mass. Medical Society)
- Hooper, William (Wilmington, N.C., lawyer)
- Hopkins, John (or James, Amer. sailor)
- Hoppe, Joachim
- Horace
- Horne Tooke, John (Brit. political reformer)
- Hotman, François (French jurist)
- Houdon, Jean Antoine (French sculptor)
- House of Representatives, U.S.
- Howard, John (Brit. prison reformer)
- Howard family
- Howe, Adm. Richard (1st lord of the admiralty)
- Howell, David (R.I. lawyer)
- Hubbard, Nicolaas (Amsterdam banker)
- Hudson Bay
- Hudson River
- Hume, David
- Humphreys, Charles (Penn. politician)
- Humphreys, Col. David (U.S. diplomat)
- Hunt, William (Mass. justice of the peace)
- Huntingdonshire, England
- Huntington, Benjamin (Conn. representative)
- Huntington, Samuel (gov. of Conn.)
- Hurd, John (Boston insurance broker)
- Hutchinson, Elisha (son of Thomas)
- Hutchinson, Foster (brother of Thomas)
- Hutchinson, Thomas (former gov. of Mass.)
- Hüttendorf, Germany
- Hyde, The (Brit. estate)