- He inherited Tulip Hill from his father, and came to live there in 1790. His portrait was painted about 1753 by John Wollaston of Annapolis.
This couple were double first cousins. As Reaney explains about their parents, "Mary [Galloway] Chew was a sister of John's father. Sarah's father [Justice Benjamin Chew] and John's mother were brother and sister" ("Tulip Hill," 383).
See the collection at the NYPL for his father. There is also this collection at the Library of Congress: "Galloway-Maxcy-Markoe family papers, 1654-1888 (bulk 1750-1860)." Here is the collection description:
"Correspondence, business papers, financial records, legal documents, speeches, reports, essays, memoranda, and other papers relating to economic conditions in Maryland (1750-1818) and foreign affairs and political events in the 1840's and 1850's. Includes the manuscript of Virgil Maxcy's biography of John C. Calhoun and numerous letters from Calhoun. Other correspondents include members of the Cheston, Chew, Howard, and Tilghman families, Lewis Cass, Daniel Dulany, Peter Force, Alexander Hamilton, Jr., David Hoffman, Francis Scott Key, George McDuffie, John F. Mercer, James Monroe, Joel R. Poinsett, Richard Rush, Joseph Story, Benjamin Tasker, Jr., George Washington, and Daniel Webster. Microfilm edition of the Higginson & Bird letterbook available, no. 16,289. Members of the Galloway, Maxcy (Maxey), and Markoe families represented include Samuel Galloway (1720-1785) and his son, John (d. 1810), merchants; John's son-in-law, Virgil Maxcy (1785-1844), lawyer, politician, and diplomat; and Virgil's son-in-law, Francis Markoe, public official."
There are also the "Cheston-Galloway Papers, 1684-1961" at the Maryland Historical Society.