In the course of a survey of manuscripts, undertaken for the forthcoming edition of Saint Bernard's works, the writer had the good fortune to find in Paris a series of unedited letters dealing with the problem of the disputed election of York. A rapid examination showed that whilst they threw no additional light on the main point at issue in this controversy, namely, on the truth of the accusations laid by his opponents against William of York, they certainly illuminated other aspects of the question, which hitherto had not been quite clear. They showed, for instance, the cause of the failure of the first legation to Rome in the early part of 1142, who were the main supporters at the Roman Curia of the opposing party, the dangers run by the Cistercians and Augustinians in presenting their case, and several other details of a like nature. Above all, the letters strongly confirmed all the conclusions reached by Professor Knowles in his article describing all the stages of this rather involved affair. Apart, therefore, from the inherent interest which a series of letters of this kind undoubtedly possesses, the decision to print them here seems, in view of the confirmation they provide, to need no further justification.