 In early days the flexible two-wheeled dray, with a centre pole and narrow iron tyres was commonly used.The four-wheeled dray or box wagon came into use after about 1860 for loads of 6 to 8 tons and was drawn by 16 to 18 bullocks.A bullock team was led by a pair of well trained leaders who responded to verbal commands as they did not have reins or a bridle.