On April 24, 1650, Marion Thomsone, a resident of the burgh of Haddington, became the subject of a legal proceeding that remains preserved within the judicial archives of the period. While the surviving documentation for this case—indexed under references C/JO/2703 and T/JO/151—is notably sparse, it confirms that the mechanisms of the Scottish legal system were set into motion against her during the height of the mid-seventeenth-century witch hunts. The records indicate that the legal process followed a specific trajectory common to the era, moving from the initial accusation to the formal registration of evidence.
The most significant aspect of the extant record for Marion is the formal entry of a confession, which was also recorded on April 24, 1650. In the judicial culture of early modern Scotland, a confession often served as the primary instrument of proof in witchcraft trials, functioning as the pivotal element upon which the court relied to conclude the proceedings. Although the specific content of Marion's testimony and the underlying circumstances of her apprehension remain lost to history, the archival evidence confirms that her encounter with the Haddington authorities reached this decisive stage on that spring day.