Melissa and Histarchers
Later this summer, AltaMira Press will release Burial Terminology: A Guide
for Researchers by R. Sprague. In reference to the recent discussion on
grave liners, it will say on page 135:
The modern terms "vault," "grave liner," or "outer container" define
underground containers of concrete, metal, fiberglass, or other durable
material into which the casket is placed. In modern undertaker terminology
a grave liner is not necessarily a closed container while a vault
completely encloses the casket.
When using Habenstein and Lamers it should be remembered that their work
was commissioned by the National Funeral Directors Association of the
United States.
Rick