Being at Edinburgh she had now to devise some means of getting into Robert Baillie's prison. For a child of her age to outwit the prison officials one would think an impossibility; but she did. Joanna Baillie states that she slipped in, noiselessly and unobserved, behind the jailer, and hid in a dark corner until he withdrew, when she stepped forward and presented the letter to the astonished prisoner. Whether or not this be true, it is a fact that she gained admission to the prison, delivered her letter, and escaped with the reply. Two years later, Sir Patrick Hume was again arrested, and although he was neither tried nor told of what he was accused, he was kept in prison for fifteen months. At first he was confined at Edinburgh, but afterwards he was removed to Dumbarton Castle. At both of these places Grizel was allowed to visit him, but the authorities never suspected that such a child would be used as a political messenger. In the presence of the jailer she would give Sir Patrick news of home. She showered kisses upon him, and delivered loving messages from her mother, sisters, and brothers. But when the jailer had withdrawn she gave her father an account of the movements of his political friends, and delivered many important verbal messages, which they had entrusted to her. By her means Sir Patrick was kept informed of his friends' actions, and was able to assist them by his advice. On being released from Dumbarton Castle he returned to his home in Berwickshire, and for a time led a peaceful life, conscious that the Government would have him arrested again if they could find a pretext for doing so. In October, 1683, information was brought to him that his friend, Robert Baillie, had been arrested in London, and imprisoned for alleged connection with the Rye House Plot. Sir Patrick's friendship for Robert Baillie was well known, and Grizel feared that her father would soon be arrested on a similar charge. Sir Patrick was of the same opinion, but the Government did not act with the promptitude he had expected. It was not until nearly a year had elapsed that a lady sent word to him that soldiers had arrived at her house, and that she had discovered that they were on their way to arrest him. Instant flight was imperative, for there was no place in Redbraes Castle in which he could conceal himself from soldiers skilled in searching for enemies of the Government. His wife and Grizel--the only people in the castle who knew of his danger--discussed with him the most likely means of escaping detection, and finally it was decided that he should hide in the family vault in Polwarth Church, which stood about a mile and a half from Redbraes Castle.