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The dry castings collected at Leith Hill on sq yard spread over yard wd form a larger .1524 in thickness. These dry castings weighed from a square grand weighed 7.453 pounds.

But there are so many compensations from washed crushed castings not being so compact as mould – the actual particles more compact, & expansion when moist, that I think it wd be better to go to measure, & I may safely take .2 of inches of damp mould in thickness as thrown up annually & this wd give 2 2/5 cubic inches flow per

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inch annually, or falling over cliff at bottom base of square yard.

At cliff at base of sloping square acre, (which is standard given in other cases). Then would fall over 4840 x 2 2/5 cubic inches, which equals square feet of mold