Mary listened to the worse counsels of each, and her distempered humour settled into a confused ferocity. Both Gardiner and she resolved to secure the trial, condemnation, and execution of her sister Elizabeth, but their plans utterly miscarried, for no evidence against her could be gathered. The princess was known to be favourable to the Protestant cause, but the attempts to prove her disloyalty to Mary were vain. She was imprisoned in the Tower, and the fatal net appeared to be closing on her. But though the danger of her murder was very great, the lords who had reluctantly permitted her to be imprisoned would not allow her to be openly sacrificed, or indeed, permit the queen to continue in the career of vengeance on which she had entered. The necessity of releasing Elizabeth from the Tower was an unspeakable annoyance to Mary. A confinement at Woodstock was the furthest stretch of severity that the country would, for the present, permit. On May 19, 1554, Elizabeth was taken up the river. The princess believed herself that she was being carried off _tanquam ovis_, as she said--as a sheep for the slaughter. But the world thought she was set at liberty, and, as her barge passed under the bridge, Mary heard with indignation, from the palace windows, three salvoes of artillery fired from the Steelyard, as a sign of the joy of the people. Vexations began to tell on Mary's spirit. She could not shake off her anxieties, or escape from the shadow of her subject's hatred. Insolent pamphlets were dropped in her path and in the offices of Whitehall. They were placed by mysterious hands in the sanctuary of her bedroom.