Anyone who has watched This Old House or Hometime or visited their local hardware store should know that sand is used for levelling tile that are not being laid on concrete or a mortar bed. I am often surprised that archaeologists seem to lose their common sense about the world around them when they "do" archaeology. Tom Wheaton Opinions Expressed Are My Own New South Associates and Other Usual Disclaimers 6150 East Ponce de Leon Ave. Stone Mountain, Georgia 30083 404 498 4155