Gaveston was not exiled immediately; he did not have to leave the realm until 25 June, but faced excommunication by the Archbishop of Canterbury, Robert Winchelsey, should he return. Edward used the intervening period to provide for his favourite's continued prosperity and political importance. As a compensation for the loss of the earldom of Cornwall, which was another condition of the exile, Gaveston was granted land worth 3,000 marks annually in Gascony, and land amounting to the same value in England. Further to this, he was appointed the King's Lieutenant of Ireland, so that a certain amount of honour could be maintained despite the humiliation of the exile. The appointment came the day after Richard de Burgh, Earl of Ulster, had been given the same position, indicating that it was an improvised measure. Gaveston's appointment came with wider authority than Ulster's, however, for he had full regal powers to appoint and dismiss any royal officers.