The arrival of Mary in England created a great difficulty for Elizabeth. If she were allowed to escape to France, both France and Spain might join hands to enforce her claims to the English succession, and if she were restored to the throne of Scotland, Moray and his friends could expect no mercy. It was determined, therefore, that Elizabeth should act as umpire between the queen and her rebellious subjects, so that by inducing both sides to submit their grievances to Elizabeth feeling between them might be embittered, and that in the meantime a divided Scotland might be kept in bondage. In her reply to the letter received from the Queen of Scotland Elizabeth informed her that she could not be received at court nor could any help be given to her unless she had cleared herself of the charges brought against her. Both parties in Scotland were commanded to cease hostilities, but at the same time Cecil took care to inform Moray secretly that he should take steps to enforce his authority throughout Scotland.[30] Mary, while repudiating Elizabeth's right to sit in judgment on her conduct, consented that a conference should be held between her commissioners and those appointed by Elizabeth and by the rebel lords. The Dukes of Norfolk, Sussex, and Sir Ralph Sadler were the English commissioners; Bishop Leslie, Lord Livingstone, and Lord Herries represented Mary; while Moray, Morton, and Maitland of Lethington appeared to present the case of the rebel lords. The conference opened at York (October 1568). Several days were wasted in attempts made by Maitland to effect a compromise so that the production of charges and counter-charges might be unnecessary, and in considering inquiries put forward by the Earl of Moray regarding Elizabeth's attitude in case the charges against the Scottish queen were proved. Some of the letters supposed to have been written by Mary to Bothwell were shown secretly to the English commissioners, but they do not seem to have produced any great effect on the Duke of Norfolk or even on the Duke of Sussex who was certainly not prejudiced in Mary's favour. The latter reported that Moray could produce no proofs except certain letters the authorship of which the Queen of Scots would deny. In fact, Sussex believed that were the affair to come to trial it would go hard with the queen's accusers.[31] In a short time Elizabeth ordered that the venue should be changed from York to London, and Mary, believing that she would be allowed an opportunity to defend herself before the peers and representatives of foreign governments, accepted the change. She sent Bishop Leslie and Lord Herries to represent her in London, but on their arrival they found that Mary would not be allowed to appear in person, though her accusers were received by the queen, nor would the foreign ambassadors be admitted to hear the evidence.