| Riley, London: Bell, 1856-93, Volume 3, : "It is a remarkable circumstance, that the barbarous nations which subsist on milk have been for so many ages either ignorant of the merits of cheese, or else have totally disregarded it; and yet they understand how to thicken milk and form therefrom an acrid kind of milk with a pleasant flavour" | |
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| The Natural History of Pliny, tr |