File:The Variety of 4 Marks.jpg

Summary
D. Christison, "The Carvings and Inscriptions on the Kirkyard Monuments of the Scottish Lowlands; particularly in Perth, Fife, Angus, Mearns, and Lothian," in Proceedings of the Society of Antiquaries of Scotland, Volume 36 (1901-02): Fig. 114, p. 117.