In March 1597, Katherine Fergus was brought before the authorities in Aberdeen amidst the intense scrutiny that characterized the witch hunts of that period. The legal proceedings against Katherine, recorded under case file C/EGD/2138, remain a stark testament to the administrative rigor of the Scottish judiciary at the close of the sixteenth century. Historical records suggest a possible link between her case and that of an individual identified elsewhere as Katherine McFerries or Ferries, a connection that highlights the complexities researchers face when reconciling the fragmentary court registers of the era.
Following the trial documented under reference T/JO/1543, Katherine was found guilty of the charges brought against her. In accordance with the judicial mandates of the time, the verdict was carried to its conclusion within the same month of her trial. Katherine was executed in March 1597, marking the definitive end of her involvement in the Aberdeen legal system and leaving behind only the concise administrative entries that confirm her tragic trajectory through the early modern courts.