 When Adelaide was first planned and mapped out by Col. William Light , Mount Osmond received the three allotments 1070 , 1277 and 1278 . While much of Adelaide was relatively quickly bought ( but not necessarily settled ) Mount Osmond did not enjoy any early buyers . The first reported activity in the area was after the mining rush of Glen Osmond due to the Wheal Watkins and Wheal Gawler mines . Lot 1277 yielded a mine in Slaughterhouse Gully but it was worked only briefly . Subsequent finds of bluestone proved fruitful and the mineral was extracted until 1900 , when mining ended and the last of the mines were either filled in or cordoned off . 
