Hutcheson, A. (1897). Notices (1) of an Ancient Canoe found in the river Tay, near Errol; (2) a Grinding-stone found on the Sidlaw Hills; (3) a Beggar’s Badge of Sixteenth Century found in Dundee; and (4) a Spear-head of Flint found in the carcass of a Whale – Being recent add. Proceedings of the Society of Antiquaries of Scotland, 31, 265–281. https://doi.org/10.9750/PSAS.031.265.281