Robert Alexander Stewart Macalister,
Ecclesiastical Vestments: Their development and history
“ The rational, if we may accept the testimony {112} of the monuments, gradually died out about the fourteenth or fifteenth century. It seems never to have been universal, and an actual rational is one of the rarest ecclesiological treasures a collector can possess.XIII. The Mitre.—Like that of the subcingulum, the history of the mitre is a curious piece of evolution; but, unlike the subcingulum, the mitre can be traced through all its history in an unbroken chain of literary references, monumental effigies, and actual specimens. ”
