Worn out by her griefs and her perplexities, her doubts and her fears, Mary's health began to give way, and her friends prevailed upon her to leave for a short time her confinement in Edinburgh Castle, and visit Seaton House, a country residence of which she was fond, only seven miles off. Lesley, after describing Mary's melancholy sojourn in the Castle, adds, that she would have "continued a longer time in this lamentable wise, had she not been most earnestly dehorted by the vehement exhortations and persuasions of her Council, who were moved thereto by her physicians informations, declaring to them the great and imminent dangers of her health and life, if she did not in all speed break up and leave that kind of close and solitary life, and repair to some good open and wholesome air; which she did, being thus advised, and earnestly thereto solicited by her said council."[65] She went to Seaton on the 16th of February, accompanied by a very considerable train, among whom were the Earls of Argyle, Huntly, Bothwell, Arbroath, the Archbishop of St Andrews, the Lords Fleming and Livingston, and Secretary Maitland.[66] It was here that a correspondence took place between the Queen and the Earl of Lennox, Darnley's father, which deserves attention. In his first letter, the Earl thanked her Majesty for the trouble and labour she took to discover and bring to trial those who were guilty of the "late cruel act;" but as the offenders were not yet known, he beseeched her Highness to assemble, with all convenient diligence, the whole nobility and estates of the realm, that they, acting in conjunction with her Majesty, might take such steps as should seem most likely to make manifest the "bloody and cruel actors of the deed." This letter was dated the 20th of February 1567. Mary replied to it on the 21st; and in her answer, assured Lennox that in showing him all the pleasure and goodwill in her power, she did only her duty, and that which her natural affection prompted, adding, that on that affection he might always depend, "so long as God gave her life." As to the assembling of her nobility, she informed him, that shortly before the receipt of his letter, she had desired a Parliament to be summoned, and that as soon as it met, the death of Darnley would be the first subject which it would be called upon to consider. Lennox wrote again on the 26th, to explain, that when he advised her Majesty to assemble her nobility, he did not allude to the holding of a Parliament, which he knew could not be done immediately. But because he had heard of certain placards which had been set up in Edinburgh, in which certain persons were named as the devisers of the murder, he requested that these persons should be apprehended and imprisoned, that the nobility and Council should be assembled, and that the writers of the placards should be required to appear before them, and be confronted with those whom they had accused; and that if they refused to appear, or did not make