T. Bryce and A. Low, “Notes (I) on a Human Skeleton found in a Cist with a Beaker Urn at Acharole, West Watten, Caithness; and (II) on the Cranial Form associated with that type of Ceramic: With an Appendix on Six Skulls found with Beakers in the North-East Counties”, PSAS, vol. 39, pp. 418–438, Nov. 1905.