High Quality Content by WIKIPEDIA articles! London. Ran for seven issues from 1959-1962. Founded and co-edited by Patrick Swift and David Wright. X, named after its dictionary definition the unknown quantity', was launched to give a platform for the individual vision and to promote artists who were unknown or unfashionable. David Wright's and Patrick Swift's legendary X set the common agenda for a generation of European painters, writers and dramatists. David Wright's introduction to An Anthology from X: "X, a quarterly review of literature and the arts, flourished, or at any rate existed, between the years 1959 and 1962. It took its name from the algebraic symbol for the unknown quantity- incalculable or mysterious fact or influence' as the Concise Oxford Dictionary defines it. Neither manifesto nor editorial introduced the first number: its contents were the manifesto.