_O_

But we found point ¼D by drawing 3D from ¼ base to ¼ distance, and by proceeding in the same way from each division, _A_, 1, 2, 3, we mark off on _SB_ four spaces each equal to 4 feet, in all 16 feet, so that by taking the whole base and the ¼ distance we find point _O_, which is distant four times the length of the base _AB_.

The Theory and Practice of Perspective 1876

"_O_," she began -- and her strange shyness overwhelming her anew, said no more.

The Orchard of Tears Sax Rohmer 1921