In the battles fought between the Egyptians and the Persians, Herodotus says it was remarked both by others and by himself that of those who remained dead on the field, the skulls of the Egyptians were incomparably harder than those of the Persians, because the latter kept their heads always covered, first with caps, and then with turbans, whereas the former kept their heads shaven and bare from infancy....
[Michel de Montaigne, tr. D.M. Frame]
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