In even the best houses, floors were generally just bare earth strewn with rushes, harboring “spittle and vomit and urine of dogs and men, beer that hath been cast forth and remnants of fishes and other filth unmentionable,” as the Dutch theologian and traveler Desiderius Erasmus rather crisply summarized in 1524. New layers of rushes were laid down twice a year normally, but the old accretions were seldom removed, so that, Erasmus added glumly, “the substratum may be unmolested for twenty years.” The floors were in effect a very large nest, much appreciated by insects and furtive rodents, and
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