Barthelmess, K. and I. Svanberg (2013). "A watercolour of a stranded sperm whale from the late seventeenth century." Archives of natural history 40(1): 3844. ABSTRACT: A manuscript album, known as Kungsboken, contains various documents of military relevance assembled during the rule of the Swedish kings Charles XI and Charles XII. Among them is a watercolour depicting a stranded sperm whale. The painting is not signed or dated but is believed to have been done around 1675. It may be an illustration of a whale that was stranded on the north German coast, then part of the Swedish empire. The painting is an interesting example of anamorphosis.