Michael Fuller
Jensen, Mogens
2020 Helleristninger som solkalendere i bronzealderen. William Dams Forlag, Ronne.
Kaul, Fleming, Martin Stolte, Finn Ole Nielsen, and Gerhard Milstreu
2005 Helleristninger: Billeader fra Bornholms bronzealder. Bornholms Museum Wormianum.
Kaul et al. (2005:Figure 102) illustrate a similar ship petroglyph Storklokkebakke as dating from 800 to 700 BC.
Hammersholm, a Bronze Age petroglyph site on the island of Bornholm (Denmark). Many thanks to Jens Baunsgaard for sharing his knowledge of this wonderful site.
Footprint petroglyph.
Jensen (2020:258) argues that this petroglyph form of a ship should be dated 1100 to 900 BC.
---------------------------------------------------------------------------------------------------------------------------
Michael Fuller (left), Jens Baunsgaard (center) and Neathery Fuller (right) at Hammersholm on 5 September 2022.
------------------------------------------------------------------------------------------------------------------------------------