In December 1649, Margaret Thomsonne was among a group of five individuals brought before the authorities in Edinburgh on charges of witchcraft. While the records surrounding this period of Scottish history are often fragmented, the judicial documentation identifies Margaret as a confessing witch, a status that placed her at the center of the legal proceedings of the time. Her confession, formally recorded in the same month as her arrest, remains the primary surviving evidence of her involvement in the case designated C/JO/2819.
Despite the gravity of the accusations, the archival trail for Margaret remains notably sparse, offering little insight into the specific allegations leveled against her or the particulars of the courtroom proceedings. The subsequent trial records, cataloged under T/JO/380, contain no descriptive details of her defense or the arguments presented by the prosecution. Consequently, Margaret remains a figure defined by the stark administrative entries of the mid-seventeenth century, representing the anonymous many whose lives intersected briefly and tragically with the complex legal and theological mechanisms of the Scottish witch trials.