The first step in a thorough, systematic
investigation is the examination of all surfaces. Surface investigation
is sometimes called "surface mapping" since it entails
a minute look at all the exterior and interior surfaces. The fourfold
purpose of surface mapping is to:
- observe every visible detail of design
- develop questions related to evidence
and possible alterations;
- note structural or environmental problems;
- help develop plans for any further investigation.
Following investigation, a set of documentary
drawings and photographs is prepared which record or "map"
While relying upon senses of sight and
touch, the most useful tool for examining surfaces is a high-powered,
portable light used for illuminating dark spaces as well as for
enhancing surface subtleties. Raking light at an angle on a flat
surface is one of the most effective means of seeing evidence
of attachments, repairs or alterations.