The best quality of baked brick is of a yellowish-white tint, and very much resembles our Stourbridge or fire brick; another kind, extremely hard, but brittle, is of a blackish blue; a third, the coarsest of all, is slack-dried, and of a pale red.

The earliest baked bricks are of this last color.

The sun-dried bricks have even more variety of size than the baked ones.

They are sometimes as large as 16 inches square and seven inches thick, sometimes as small as six inches square by two thick.

Occasionally, though not very often, bricks are found differing altogether in shape from those above described, being formed for special purposes.