Complex sentence: C.P.R.R. Vice President, uncle of Henry E. Huntington, (1850--1927), founder of the famous Huntington Library with its art galleries and gardens in San Marino, California.
Split into simpler sentences: C.P.R.R. Vice President, uncle of Henry E. Huntington, (1850--1927). Henry was founder of the famous Huntington Library with its art galleries and gardens in San Marino, California.