Life and work at the Great Pyramid during the months of January, February, March, and April, A.D. 1865 : with a discussion of the facts ascertained
A three-volume survey of measurements taken at the Great Pyramid of Giza by Scottish Astronomer Royal Charles Piazzi Smyth, published in Edinburgh in 1867 for antiquarians and astronomers. The plates are engraved architectural sections, plans and elevations, dense with diagonal hatching, dotted sightlines, inch scales and lettered keys marking passages, chambers and casing stones.
