Joseph N. Hallock (English Wikipedia)

Fleming, Geoffrey K. (2004). Southold. Arcadia Publishing. p. 22. ISBN 978-0-7385-3596-8.
Portrait and Biographical Record of Suffolk County, (Long Island) New York. Chapman Publishing Co. 1896. pp. 378–379 – via Google Books.
Shaw, Albert (1892). The Review of Reviews. Review of Reviews. p. 607.
Brooklyn Daily Eagle Almanac. Brooklyn Daily Eagle. 1895. p. 84.
Murlin, Edgar L. (1899). The New York Red Book. Albany, N.Y.: James B. Lyon. pp. 196–197 – via Google Books.
Murlin, Edgar L. (1900). The New York Red Book. Albany, N.Y.: James B. Lyon. pp. 131–132 – via Google Books.
Murlin, Edgar L. (1901). The New York Red Book. Albany, N.Y.: James B. Lyon. pp. 131–132 – via Google Books.

hathitrust.org

Bailey, Paul, ed. (1949). Long Island: A History of Two Great Counties, Nassau and Suffolk. Vol. III. New York, N.Y.: Lewis Historical Publishing Co., Inc. pp. 3–4 – via HathiTrust.

"Hon. Joseph N. Hallock, President of Southold Savings Bank, Passes Away". The Long Island Traveler-Mattituck Watchman. Vol. 72, no. 6. Southold, N.Y. 8 October 1942. pp. 1, 5 – via NYS Historic Newspapers.

"Joseph N. Hallock, Ex-Assemblyman, 81" (PDF). The New York Times. Vol. XCII, no. 30933. New York, N.Y. 3 October 1942. p. 15.