The 19th century saw the codification of the rules of football at several public schools, with those of Rugby School (first published 1845) and Eton College (first published 1847) being particularly influential, in addition to those of Harrow, Winchester and Shrewsbury.[5] The need for alumni of different public schools to be able to play against each other resulted in several sets of "compromise laws", often known as Cambridge rules, being drawn up at the University of Cambridge between the 1830s and the 1860s.[5]