It hath been an antient custom among them [Hungarians] that none
should wear a fether but he who had killed a Turk, to whom onlie
yt was lawful to shew the number of his slaine enemys by the
number of fethers in his cappe.
Quotes, by Richard Hansard , Source: Description of Hungary, Anno 1599, Lansdowne Manuscript 775, vol. 149, British Museum