W. I. Macadam, “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”, PSAS, vol. 16, pp. 204–223, Nov. 1882.