sentences:  The quality of the sandstone known to Sydneysiders as "Yellow block" became well known early.Called on by the Colonial Architect, for example, to be used in the main buildings of the University of Sydney, the stone was supplied from the Pyrmont quarries where there were at least 22 quarrymen working by 1858.Among them was Charles Saunders, licensee of the hotel 'The Quarryman's Arms' who became Pyrmont's biggest quarrymaster.