The Dutch gunboat no. 18 was between 15 November and 1 December 1856 and on 22 May 1878 docked in the aft dry dock and between 10 and 15 August 1868 in the fore dry dock at the navy yard at Hellevoetsluis, Netherlands.
Source
Archive Marine-Etablissement Hellevoetsluis 1738-1913(Nationaal Archief, The Hague) inventory number 507.
