was the nephew of Edward Walter Clark Jr., commodore of the Philadelphia Corinthian Yacht Club and father of Edward III; Clarence Munroe Clark, a noted tennis player like his brother; and Percy Clark, a lawyer and noted cricketer. Percy's daughter Mary was married to Nelson Rockefeller from 1930 to 1962, before he served as Vice President of the United States. Clark's paternal grandmother was the daughter of Joseph and Jane (née Todhunter) Sill, who were social reformers and leaders in antebellum Philadelphia's benevolence movement. Joseph Sill served as secretary, vice president, and president of the St. George Society of Philadelphia, an aid organization for English immigrants. Clark was married three times and had two children. He and his first wife, Elizabeth Story Jenks, had one son, Joseph S. Clark III. He was married to his second wife, Noel Hall, from April 1935 until their divorce in September 1967. He and Noel had one daughter, Noel Clairborne Clark. Two weeks after his divorce, Clark married Iris Cole Richey, a former editor of the Pennsylvania Manual, to whom he remained married until his death. Writings The Senate Establishment (1963) Congress: The Sapless Branch (1964) References External links The Joseph Sill Clark Papers, including reports, articles, news releases and some correspondence, are available for research use at the Historical Society of Pennsylvania. 1901 births 1990 deaths 20th-century American politicians 20th-century Unitarians United States Army Air Forces personnel of World War II American Unitarian Universalists Burials in Pennsylvania Chestnut Hill Academy alumni Clark banking family Democratic Party United States senators from Pennsylvania Harvard College alumni Lawyers from Philadelphia Mayors of Philadelphia Middlesex School alumni Military personnel from Philadelphia Officers of the Order of the British Empire Pennsylvania Democrats Pennsylvania Republicans Recipients of the Legion of Merit United States Army Air Forces officers University of Pennsylvania Law School alumni World federalist activists United States Army colonels 20th-century American lawyers Members of the American Philosophical Society