• Title
  [Keystone `R R 1789']
• Call number
  XR 9
  
• Level of description
  fonds
• Date
  
  1789
• Type of material
  Graphic Materials, Objects
• Reference code
  447196
• Physical Description
  Objects - 42 cm. (vertical dimension) x 31 cm. (deep) x approx. 25 cm tapering to approx. 20 cm. (front and reverse faces) - Some surface staining and wear. Chisel or pick marks on top, bottom, front and reverse faces - 1 sandstone keystone
  
• Access Conditions
  
  Access via appointment
• General note
  
  "The stone was found in the internal stone wall of the old Military building at Dawes' Point when it was demolished in October, 1924. It was probably part of the first Observatory, being afterwards incorporated in the Military building, which consisted of four rooms with stone walls nearly three feet thick. It was discovered at about the centre of the building in the wall of the room marked on plan as Non-Com's. room, the inscription being covered with plaster. The great thickness of the stone walls of this part of the plan prove that they were of a much older type than the other portion - which was constructed of brick - many of the bricks being marked with the broad arrow and others with various old brickmaker's marks. The spot where the stone was found is fixed by its co-ordinates being 1260 feet east and 1652 feet North from Trig. station E or the Time Ball Staff of the Obervatory, and about 65 feet above sea level. The Latitude and Longitude of the first Observatory, as fixed by Lieutenant Dawes were respectively 33 [degrees] 52' 30" and 151 [degrees] 19' 30"." -- Letter from Kathleen Butler, Secretary to Chief Engineer, Sydney Harbour Bridge, to W. H. Ifould, Principal Librarian, Public Library of NSW, 19th Feb. 1926 (filed at An 36)
  A plan of Dawes Point supplied by the Chief Engineer, Sydney Harbour Bridge, showing the location of the keystone, was previously filed at F11/49. It was subsequently transferred to the Archives Office of NSW (now State Records NSW) and is held at AO map 6317
  Digital order no:Album ID : 823611
• Signatures / Inscriptions
  
  R R 1789 -- engraved on a surface which would meet adjacent stone when in place
• Topic
  keystones
  sandstone
  
• Place
  Dawes Point (N.S.W.)
  
• Exhibited in
  
  Rocks Discovery Museum (Colony exhibition)
• Open Rosetta viewer
  IE3238794

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