Don Bigelow, Susan's husband, had previously melted 10 Big Wax Crayons together, to make one really big one. At the cemetery, he taped Pellon Cloth over the stone, and colored the whole cloth against the stone.
Association for Gravestone Studies - Recommended process at http://www.justcallbob.com/grave.htm Farber, Jessie Lie, "Gravestone Rubbing for Beginners." Published by AGS, 30 Elm Street, Worcester, MA 01609.
"Instruction for getting started right, written with special concern
for the gravestones being rubbed. Recommended for anyone unfamiliar
with rubbing using rubbing wax or lumberman's chalk or crayon,
especially teachers or group leaders planning to introduce gravestone
rubbing to others. 6 pages. "