"Though we may not desire to detect fraud, we must not, on that account, endeavor to be insensible of it, for, as cunning is a crime, so is duplicity a fault, and if men dread knaves, they also despise fools."

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Fresh pitsand, however, in spite of all its excellence in concrete structures, is not equally useful in stucco, the richness of which, when the lime and straw are mixed with such sand, will cause it to crack as it dries on account of the great strength of the mixture. But river sand, though useless in "signinum" on account of its thinness, becomes perfectly solid in stucco when thoroughly worked by means of polishing instruments.

— Marcus Vitruvius Pollio