Correspondence and documentation exchanged between Robert M. Porter and Uphill in 2002 and 2007.
25 pages (16 single-sided + 9 double-sided)
The first exchange in 2002 concerns the construction of Fourth Dynasty pyramids and Porter's article, which was written in response to another article published on the same subject.

• Dorka, Uwe E. 2002. "Lifting of stones in 4th Dynasty pyramid building". Göttinger Miszellen 189, 11-22 (OEB 49710)
• Porter, Robert M. 2003. "Pyramid building: a response to Dorka and others". Göttinger Miszellen 194, 105-107 (OEB 180943)
  The second group consists of a letter from Porter in 2007 relating to ramps used for the construction of Neferirkare's pyramid, along with a copy of Porter's paper "An easy way to build a pyramid," a conference paper presented at Current Research in Egyptology VIII, Swansea, 2007
• Also see Porter, Robert M. 1994. "An easy way to build a pyramid". Göttinger Miszellen 139, 93-94 (OEB 38447)