In the autumn of 1649, Agnes Thomson, a resident of Crichton in Edinburgh, became one of the figures swept into the judicial machinery of the Scottish witch trials. On October 16, 1649, she was formally processed by the authorities as part of a group of six individuals facing accusations of witchcraft. This mass apprehension reflects the heightened communal and legal tensions characteristic of the period, as local officials worked to document and prosecute those suspected of involvement in occult practices.
Following her arrest, Agnes underwent the standard legal processes of the era, which culminated in a recorded confession during that same month. While the surviving documentation for her trial remains sparse—offering no specific details regarding the testimony provided or the ultimate verdict reached—the existence of the confession record signifies that Agnes was subjected to interrogation, a critical stage in the seventeenth-century judicial pursuit of those believed to have renounced their Christian faith. Her case stands as a representative entry in the official registers (C/EGD/1984 and T/JO/359), marking her place within the wider, turbulent history of the 1563–1736 witchcraft persecutions.