- Letter from Joseph Stephen Cullinan II of Houston, Texas dated February 14, 1980; enclosures.
- Memorandum re: Cullinan Family, written by Nina Jane Cullinan, dated May 7, 1979.
- Research from Charles A. O'Connor, O'Hart's Irish Pedigrees (New York), genealogical tract dated January 15, 1927.
- Letter from J.S. Cullinan, Houston, Texas to Anna Cullinan, Washington, Pennsylvania dated January 27, 1927.
- Also consulted: Who was Who Series and Directory of American Biography, Supl. 2:133-4 (1958).
- US Social Security Index (public domain).
- US Federal Census (1920) for the State of Pennsylvania.
- King, John O. Joseph Stephen Cullinan: A Study of Leadership in the Texas Petroleum Industry 1897-1937 (Vanderbilt University Press, 1970).
- Rand, Clayton. Sons of the South (Holt: 1961).
- New York Times (Various years).
- Joseph Stephen Cullinan (1860-1937) married Lucie Alberta Halm (1862-1929). "Went to work at the age of 12 when his father died. He worked in the Western Pennsylvania and Ohio oil fields until he came to Texas around 1898 and first settled
in Corsicana, Texas although he intended to move on to California. He was asked to stay in Corsicana as they were having trouble with water wells and he was reputed to know a lot about wells. From that time on, his whole life reversed and he stayed
on in Corsicana in 1905. It is said that he was the first one to use oil to de-dust the road. At any rate, he had discovered the potential of oil wells in Texas and dedicated his whole life to this industry. He continued to make his home in Texas
until his death in 1937 and among his many successful endeavours, he was one of the founders of the Texas Company (--Nina J. Cullinan, May 7, 1979)."
- In email correspondence with Nancy Chamberlain, I learned that there were several discrepancies between with Nina Cullinan's accounts (above) and primary sources. This will explain several anomalies found in John O. King's book on Joseph Stephen