Anchor Stones are small stone architectural building blocks made from quartz sand, chalk, and linseed oil. They are sold sequentially in sets with an instruction booklet of plans for various constructions. This is a repository of additional constructions that can be made.
I made some modifications to the 6_8 model. The #316 blocks were removed, the tower is a little taller, and both roof tops are now trimmed in yellow. It's undecided which version of this model looks better.