The Nuttall Encyclopedia
tribunal in Germany during the Middle Ages, of which there were several, all powerful, in connection with a secret organisation under sanction of the emperor for the enforcement of justice and punishment of crime at a period when the States severally were too weak to uphold it. These courts were held in secret places at night, and inspired great terror in the 13th and 14th centuries.
Wood, James, ed. Entry for 'Vehmgerichte'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/v/vehmgerichte.html. Frederick Warne & Co Ltd. London. 1900.