Excerpt from Huntington Library, Andrew O. Porter collection:

"Don Carlos Porter was the son of Andrew O. and Anna Porter. From 1897 to about 1904 he was City Attorney for South Pasadena.
He founded a law partnership with Charles T. Sutton under the name Porter and Sutton. It became one of the oldest law firms in Los Angeles.
Don, as he was known in later life, was one of the youngest men that the First Methodist Church of Pasadena ever had as a Trustee. He retained his position there until shortly before his death at the age of 88 in 1959.
He was active in the Pasadena Pioneer Association and the Pasadena Historical Society.
Don married Lura Whitlock, whom he had met at the University of Southern California. After her death he married her sister, Maud. Lura Whitlock Porter was the wife of Don Carlos Porter. Mrs. Porter was the daughter of the late B.C. Whitlock, who came to Los Angeles, California from Illinois in 1884.
In 1902, she married Don Carlos Porter and resided at the family home on Orange Grove Avenue in South Pasadena. The couple had one son: Andrew O. Porter. She was a graduate of the University of Southern California and of Stanford University.
She was interested in work among orphan children, and was on the board of managers of both the Children Training Society and the Boys and Girls Aid Society. She was the secretary of the Pasadena Garden Club, and a member of the First Methodist Church.
Andrew O. Porter, the second was born in 1907, the son of Don Carlos and Lura Whitlock Porter. After earning his L.L.B. at Harvard Law School, he was admitted to the bar and practiced in association with his father for ten years.
In 1938, Andrew Porter was elected to the City Council of South Pasadena and was appointed Mayor two years later being one of the youngest in the country. He resigned to enter the Navy in 1943. He married Louise H. Stone, daughter of Dr. and Mrs. Willard J. Stone of Pasadena. They had three sons: Thomas, John, and Carlos Porter."