Hutcheson, Alexander. “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 (November 30, 1897): 265–281. Accessed April 30, 2024. https://journals.socantscot.org/index.php/psas/article/view/6669.