Plaster and mortar have been found at Jamestown in abundance. It appears
that the majority of brick houses and many frame structures had
plastered walls and ceilings after 1635. Some plaster found had been
whitewashed, while other plaster bore its natural whitish-gray color.
Mortar was found wherever brick foundations were located. The plaster
and mortar used at Jamestown was made from oystershell lime, sand, and
clay.