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Covering about 50 acres and almost 600 feet deep, it lays claim to being the world’s largest operating deep-hole quarry for dimension stone.

Besides, it depends on the owner whether he desires to build in brick, or rubble work, or dimension stone.

Since such very powerful kings have not disdained walls built of brick, although with their revenues and from booty they might often have had them not only of masonry or dimension stone but even of marble, I think that one ought not to reject buildings made of brick-work, provided that they are properly "topped."

Dimension stone, flint, rubble, burnt or unburnt brick,—use them as you find them.

Finally, build the wall of dimension stone, with the bond stones as long as possible, so that particularly the stones in the middle may be held together by the joints.