Note 137 — Chapter XIII · KITES AND HARRIERS
D. C. (Douglas Craven) Phillott translation
Qāpāq, the “deck-feathers” of old English falconers. According to the Boke of St. Albans the centre or uppermost tail-feather was called the beme feder of the tayle, the flight-feathers being called the beme federes of the wyng.