Macadam, W Ivison. 1882. “On the Results of a Chemical Investiagation into the Composition of the ’Bog Butters,’ and of ’Adipocere’ and the ’Mineral Resins,’ With Notice of a Cask of Bog Butter Found in Glen Gell, Morvern, Argyllshire, and Now in the Museum”. Proceedings of the Society of Antiquaries of Scotland 16 (November):204-23. https://doi.org/10.9750/PSAS.016.204.223.