In the south the capital of the Presbyterian special settlement was mushrooming into a frontier city. Mason formed a partnership with David Ross (1827–1908) a Scottish-born Fellow of the Institute of British Architects who was already resident. There now followed numerous projects and a series of changing partnerships. The one with Ross was dissolved early in 1863. Of numerous small commissions the Dunedin Public Warehouse, for William Dalrymple, now 386 Princes Street, is a more substantial example. A three-story building in brick it has a vigorously modelled street front with emphatic quoining used to define the edges and apertures of the facade. Those around the windows rise to form round-topped columns. There are echoes here of the fenestration of the second Government House but the relative simplicity and strength of the Dunedin building shows the designer his own master again and possessed of a corresponding new confidence.