The foregoing letter appears to have been written, in the tenth year of the reign of King Edward the Fourth, A.D. 1470; when the quarrel between the King and the Duke of Clarence and Earl of Warwick, which had been lately made up, broke out with increased violence; in consequence of the affront put on the Archbishop of York by the King, in suspecting him of an attempt on his life by poison, at an entertainment to which he had been invited, Clarence and Warwick resented this highly, and seeing that Edward's jealousy of them hadtaken too deep root to be removed, retired, about March 7, to Warwick, where they assembled a body of troops, in order to join Sir Robert Welles, who had taken up arms in Lincolnshire; but being disappointed by his defeat, and also in their subsequent design of proceeding into Yorkshire, by the King's diligence, they retired into Devonshire, whence they made their escape, with their families, to Calais. See Carte's History of England, Vol. II. pp. 779 and 780.