In Andrew Hodges' biography of Alan Turing, while discussing Turing's 1936-38 stay at Princeton University, he writes that "[t]he tower of the Graduate College was an exact replica of Magdalen College Oxford, and it was popularly called the Ivory Tower, because of that benefactor of Princeton, the Procter who manufactured Ivory soap."[4] William Cooper Procter (Princeton class of 1883) was a significant supporter of the construction of the Graduate College, and the main dining hall bears the Procter name.