the "'s lands zeemagazijn" was the arsenal of the amsterdam admiralty, built in nine months and containing enormous supplies for the building and equipping of warships. johann jakob wilhelm heinse saw, when he was travelling in holland: ""wood, coils of rope of 150 fathoms in length and as thick as a woman's leg, all sorts of sails, bullets, anchors, cannon, muskets and guns, lamps, compasses and hourglasses"". the first anglo-dutch war ended infelicitously for the dutch, and this added to the city administration's readiness to have the arsenal built. on 12 august 1655, the admiralty was given the entire western strip of kattenburg island for the construction of a warehouse and timber-wharf, in exchange for so far enclosed grounds it had occupied in the area.