Smith, John Alexander, and Stevenson McAdam. “Notice of Bronze Celts or Axe Heads, Which Have Apparently Been Tinned; Also of Bronze Weapons and Armlets, Found Along With Portions of Metallic Tin Near Elgin in 1868”. Proceedings of the Society of Antiquaries of Scotland 9 (November 30, 1873): 428–443. Accessed June 15, 2024. https://journals.socantscot.org/index.php/psas/article/view/5521.