By the early 1790s Dr. Aikenhead had become interested in the principles of the United Irishmen. On one occasion Lord Edward Fitzgerald disguised as a Quaker sought refuge in the Aikenhead home. He was enjoying dinner with the family when the house was surrounded by troops with the sheriff at their head. The visitor managed to disappear and reach safety across the river. The house was searched but because of the loyalty of his apprentices who knew and kept the doctor's secret, no incriminating documents were found.