sentences:  Prior to the gold rushes in Australia, in the mid 19th century, bullock drays carried essential food and station supplies to isolated country areas.On return trips they transported wheat, wool, sugar cane and timber by drays drawn by teams of draught animals (either bullocks or horses) to shipping ports before the advent of rail.They travelled constantly across the landscape, servicing the pastoral stations and settlements far from regional transport hubs and urban centres.