Cursiter, J. “Notices (1) of a Bronze Dagger, With Its Handle of Horn, Recently Found in the Island of Rousay; And (2) of an Inscription in Tree-Runes, Recently Discovered on a Stone in the Stone Circle of Stennis, Orkney”. Proceedings of the Society of Antiquaries of Scotland, Vol. 42, Nov. 1908, pp. 74-78, doi:10.9750/PSAS.042.74.78.