These additional resources from the federal, state and county-levels.  Check with the individual site to determine hours of visitation or to contact the office(s).

Canal Society of New Jersey
300 Mendham Road
Morris Township, New Jersey 07960
(973) 292-2755

Genealogical Society of New Jersey
P.O. Box 1476
Trenton, New Jersey 08607-1476
https://www.gsnj.org/contacts/

Historical Maps of New Jersey
Rutgers Cartography Services
Rutgers Special Collections & University Archives
Archibald S. Alexander Library
Rutgers, the State University of New Jersey
169 College Ave.
New Brunswick, NJ 08901-1163
(848) 932-6000

Library of Congress Digital Collections
101 Independence Ave, SE
Washington, DC 20540
-- Historic American Buildings Survey/Historic American Engineering Record/Historic American Landscapes Survey [link]
-- Chronicling America, Historic American Newspapers [link]

National Archives (NARA)
US National Archives and Records Administration
1-86-NARA-NARA (1-866-272-6272)
TDD Line: 711

National Register of Historic Places
National Park Service
National Register of Historic Places
1849 C Street, NW (7228)
Washington, DC 20240
Phone: (202) 354-2211

New Jersey State Archives

225 West State Street
P.O. Box 307
Trenton, New Jersey 08607
(609) 292-6260 (main)

New Jersey State Library
185 W. State Street
Trenton, New Jersey 08625
(609) 278-2640

New Jersey State Museum
205 West State Street
Trenton, New Jersey 08607
(609) 292-6464

Soldiers & Sailors Database (National Park Service)

National Park Service
U.S. Department of the Interior

Warren County Library (Local History & Genealogical Collections)
2 Shotwell Drive
Belvidere, New Jersey 07823
(908) 818-1280 (reference) 
Email

Map Resources

Beers Atlas (1874), Warren County, NJ (Historic Map Works)

 Sanborn Maps, Warren County, NJ (Library of Congress)

Sanborn Maps (Princeton University)-- entire collection for NJ

Southwestern Highlands Topographical Map (George Hammell Cook; David Rumsey Map Collection), 1885. 

Other Resources

"A Henry Family Genealogy (in progress)." Jacobsburg History. [link]

Armes, Ethel. Nancy Shippen Her Journal. J.B. Lippincott Co., 1935. [link]
*The subtitle of this book is "The International Romance of a Young Lady of Fashion of Colonial Philadelphia with Letters to Her and About Her," which was compiled and edited by Ms. Armes. 

Armstrong, William Clinton. The Axfords of Oxford, New jersey, a genealogy beginning in 1725. Morrison, IL: Shawver Publishing Co., 1931. [link]
*There may be errors with some of the genealogical information

Cummins, George Wyckoff. History of Warren County, NJ. NY: Lewis Historical Publishing Co., 1911. [link]

Klein, Randolph Shipley. Portrait of an early American family: The Shippens of Pennsylvania across five generations. Philadelphia, PA: University of Pennsylvania Press, 1975. [link]

Klein, Randolph Shipley. The Shippen Family: A Generational Study in colonial and revolutionary Pennsylvania. Ann Arbor, MI: 1972. (limited preview) [link]

Kraft, Herbert C, ed. A Delaware Indian Symposium. Anthropological Series, No. 4. Pennsylvania Historical and Museum Commission. Harrisburg: 1974. [link]

Schrabisch, Max. Archaeology of Warren and Hunterdon Counties. Bulletin 18. Geologic Series. Department of Conservation and Development. State of New Jersey. Trenton, NJ: MacCrellish & Quigley Co., State Printers, 1917. [link]

Snell, James P., Clayton, W.W. History of Sussex and Warren counties, New Jersey. Philadelphia, PA: Everts & Peck, 1881. [link]

Stewart, R. Michael. References Relevant to the Archaeology of Native Americans in the Upper Delaware Valley of New Jersey, New York and Pennsylvania. Trenton, NJ: NJ Historic Preservation Office, 2018. [link]

Warren County Historic Markers (122)

There are 122 documented historic markers in Warren County, NJ. To view them, you can visit the Historical Markers and War Memorials in Warren County, New Jersey page (not affiliated with the County of Warren or the Division of Cultural & Heritage Affairs). [link]