The large monoliths of Sarsen Stone were first of all roughly shaped
as they lay _in situ_ on the Plain and then transported to the chosen
site.
The Foreign Stones were also dressed on the spot before erection.
The entire work was performed with stone tools of the roughest
description, weighing from half a pound to over sixty pounds. (See p.
40.)
The only trace of metal discovered in 1901, was a small stain of
bronze on one stone, caused by contact with the stone of some very
small bronze object, possibly an ornament. (See page 53.)
The large Trilithons were erected from the centre of the site.
The Foreign Stones were placed in position afterwards. (See pages
45-49.)