Anderson, J. (1889) “Notice of the Quigrich or Crosier, and other Relics of St Fillan, in the Possession of their Hereditary Keepers, or Dewars, in Glendochart, in 1549-50”, Proceedings of the Society of Antiquaries of Scotland, 23, pp. 110–118. doi: 10.9750/PSAS.023.110.118.