Callander, J.G. 1910. Notice of (1) A Seventeenth-Century Sun-dial from Wigtownshire; and (2) a Stele, discovered in Galatia, Asia Minor, decorated with a design resembling the Mirror and Comb Symbols found in Scotland. Proceedings of the Society of Antiquaries of Scotland. 44, (Nov. 1910), 169–185. DOI:https://doi.org/10.9750/PSAS.044.169.185.