Edward Cuthbert Butler,
1911 Encyclopædia Britannica, Volume 11…
(1911)
“ In England the chief orders of friars were distinguished by the colour of their habit: thus the Franciscans or Minors were the Grey Friars; the Dominicans or Preachers were the Black Friars (from their black mantle over a white habit) , and the Carmelites were the White Friars (from their white mantle over a brown habit) : these, together with the Austin Friars or Hermits, formed the four great mendicant orders—Chaucer’s “alle the ordres foure.” Besides the four great orders of friars, the Trinitarians (q.v.) , though really canons, were in England called Trinity Friars or Red Friars ”
