"'Cause it's glazed, and probably burned harder than yours. Didn't you see that the inside was of a different color from the outside, and there was something smooth and shiny all over it? That's the glazing, that makes it as tight as though it was made of glass. That's a secret they keep to themselves; but I believe they burn lead, and mix other things with it, put it on, and then bake it in. But the potter's ware that is not glazed will hold water well enough: the water won't drop, and it takes a long time to soak out; all the trouble is, whatever you put into it soaks in, and you can't keep it so clean as though it was glazed."
"Then what made ours leak so fast?"
"Were there cracks in it?"
"Yes, sir; lots of 'em."
"Did you put sand in your clay, just as we do when we make mortar?"
"Yes, sir."
"What else did you do to it?"
"Worked it with the hoe, just as we do mortar."
"Was that all?"
"Yes, sir."