1. An alternative interpretation of the Viking sundial artefact: an instrument to determine latitude and local noon by Balázs Bernáth, Miklós Blahó, Ádám Egri, Barta András, and Gábor Horváth Proceedings A Volume 469(2154):20130021 June 8, 2013 ©2013 by The Royal Society

2. (A) Photograph of the eleventh century sundial artefact fragment found by Veabek in Uunartoq in Greenland in 1948. Balázs Bernáth et al. Proc. R. Soc. A 2013;469:20130021 ©2013 by The Royal Society

3. (A) Scratches and depressions in the face of the compass dial artefact. Balázs Bernáth et al. Proc. R. Soc. A 2013;469:20130021 ©2013 by The Royal Society

4. Fundamental lines of the trigon-based constructions of horizontal sundials with 20 mm high gnomons. Balázs Bernáth et al. Proc. R. Soc. A 2013;469:20130021 ©2013 by The Royal Society

5. (a) Reconstruction of the compass dial artefact as a combination of a sun-compass and a sun shadow board providing an interpretation for several incised lines. Balázs Bernáth et al. Proc. R. Soc. A 2013;469:20130021 ©2013 by The Royal Society