The perfect horseman, or, The experienced secrets of Mr. Markham's fifty years practice shewing how a man may come to be a general horseman, by the knowledge of these seven offices, viz. the breeder, feeder, ambler, rider, keeper, buyer, farrier
Markham, Gervase, 1568?-1637., Thetford, Lancelot.
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His Hayr▪

If an Horse that is of any dark colour, shall grow grissell onely about his Eyebrows, or underneath his Mane; or any horse of a whitish colour shall grow meannelled with either black or red meannels universally over his body, then both are signes of old age.