I was able to get a look at the Abridgements of Sasines.
840 (No 2). 1900-03-15. 3727/56. Disp by George Anderson, Builder, No 40 Shandwick Place, Edinburgh to William Kuhn, Print Seller and Picture Frame Maker, No 133 Lothian Road, Edinburgh of Area of ground, bounded on the south by Craigcrook Road, along which it extends 39 Feet 3 inches, forming the western division of 242/1000 Acre of ground part of the Lands of Craigcrook in the parish of Cramond dated Mar 14 1900.
6867. No 165. Mary 25 1920. 3-4. Disp by Suzanne Schnitzler or Kuhn, widow, residing at 33 London Street, Edinburgh, to Russell Paton, Organising Secretary, Royal Infirmary, Edinburgh, residing at 3 Craigcrook Terrace, Blackhall, in Area of ground bounded to the south by and extending 39 Feet 3 inches along Craigcrook Road,with House etc thereon, forming the western division of 242/1000 Acre of ground part of the Lands of Craigcrook in parish of Cramond, Dated May 15, 1920.
841 (No 3) records the sale of the eastern division of 242/1000 acres, extending 36 feet 3 inches on Craigcrook Road, by George Anderson to William Butler, grain merchant, No 16 Stafford Street, Edinburgh.
840 (No 1) records a feu by the Trustees of the Craigcrook Mortification to George Anderson, Builder.
So the story seems to be that in 1901 George Anderson acquired 242 1000ths of an acre from the Craigcrook Mortification (whatever that is), and probably did a deal whereby he split the ground into two parcels, sold them to William Kuhn and William Butler, and presumably built a pair of semidetached houses on it for them.