A wall that resulted from excavation is ruled as a garlic peel. How so? There is a wall between two recesses or between two underground chambers. [If] tumah is in the open areas of the catacomb, and there are utensils in the wall that are covered very thinly, [the utensils] remain tahor. [If] tumah is in the wall, covered very thinly, and in the open areas there are utensils, [the utensils] re-main tahor. [If] tumah is underneath a pillar, tumah penetrates upward and downward.