1. Biography of Philip Crosthwaite by Kay Prusinskas, 1825-1903.
2. Excerpts from W.E. Smythe's "History of San Diego" pp.269-275.
3. Philip Crosthwaite-San Diego Pioneer and Public Servant. Journal of San Diego History Summer of 1978. Pages 43-48 by Pamela Tamplain.
4. 1982 Poway Historical Society's guest speaker-Ray Stock.
5. Notes from Book of Deeds, San Diego county done by Winnifred Davidson, 1935.
6. Obituary San Diego Union for Philip Crosthwaite Feb.20, 1903
7. "Scrappy Irishman cut a notable notch in San Diego Annals" from the Tribune, dated March 18, 1948, about Crosthwaite.by Arthur Ribbel.
8. Article from The Tribune-Sun, March 18, 1948 on Philip Croswaithe's son Wm, T.Crosthwaite.. Photo~of Broadway Ave. in March 18, 1948.
9. Article by Herbert Lockwood "Border Shenanigans" concerning son Edward Crosthwaite. Date and newspaper unknown.
10. Article on the Pauma Massacre by Lockwood. Date and source unknown.
11. Birth of Philip Crosthwaite's first great=great grandson in Escondido.
Date and paper unknown.
12. Visit to Poway Museum of a 6th generation descendent of Philip Crossthwaite.
13. Copy of Baptismal Certificate for Carlos Enrique Crosthwaite, Philip's.son' May 8,1871.
14. Article on speech given by Ramon Osuna, Philip's grandson to the Poway Historical Society.
15. Genealogy chart of Crosthwaite family.
16. Biographical data questionnaire for Ramon Osuna, born 1882.
17. Copy of Ruth Osuna's genealogy-granddaughter of Philip Crosthwaite.
18. Copy of family tree of Rosario Aguilar and wife Maria Lorenzo Morillo.
19. Family tree on Joseph Crosthwaite and marriage to Julia Osuna..
20. Article from Daily Times-Advocate July 21, 1968 on Philip Crosthwaite, entitled "Irish native became first to settle in Poway."
21. San Diego Union June 9, 1968 article on Philip Crosthwaite's grave being honored in Masonic ceremony
22. Poway's first settler, article in Daily Times Advocate, Escondido, dated April 28, 1966, by Eloise Perkins.
23. "Poway's first rancher was soldier" by Eloise Perkins in Daily Times-Advocate, dated Dec.30, 1873,
24. The San Diego Union, June 2nd, 1969 "Masons to Honor San Diego Pioneer."
25. "How Poway got its railroad" by Eloise Perkins in the Daily Times-Advocate dated Feb.25, 1968..