1765789 Clock and gunpowder horn, Anonymous, c.1590-6 (iron) by Dutch School, (16th century); Rijksmuseum, Amsterdam, The Netherlands; (add.info.: This clock was originally intended as merchandise for sale or as a gift. It was hung up in the ???ave House??as the only means of providing a sense of time during the long, polar nights. On 3 December 1596, it froze. Barentsz and Van Heemskerck shoved a parting letter into the gunpowder horn when they left. Three centuries later, the horn was rediscovered with the letter still inside. The letter cannot be exhibited due to its fragility.); Dutch, out of copyright.