Considered the worst civil engineering failure in the history of California and the state’s second-worst disaster in terms of lives lost, the collapse of the St. Francis Dam ended the storied career of William Mulholland, the man who earlier had masterminded construction of the Los Angeles Aqueduct. To contextualize Mulholland’s responsibility for the dam’s failure, historians Norris Hundley, Jr. and Donald C. Jackson relied extensively on items in The Huntington’s collections for their book titled "Heavy Ground: William Mulholland and the St. Francis Dam Disaster." In addition, roughly a third of the book’s illustrations are drawn from The Huntington’s collection.