[St M.58L]                                                            [St M.58]							58
                                                                      
[blank]                                                               [diagram] 1 porphyry [diagram] 2 porph  [diagram]  x  y  joint
                                                                      
                                                                      1. base of A
                                                                      2    -     of B
                                                                      below a.
                                                                      square plinths
                                                                      in all without
                                                                         bases
                                                                      a  b  - is circular
                                                                      plinth. worked
                                                                        with the square
                                                                         in own block.
                                                                      Both the cavettos
                                                                      are remarkably
                                                                          fine conic sections not circles
                                                                      and  x  y is like their character
                                                                        These bases are in deep red Verona

[Version 0.05: May 2008]