(In honor of St. Patrick's Day, here's a comfortable costume for a gentleman who wants to be informal at a ball.)
An Irish cab-driver; green coat patched, brass buttons, brocaded waistcoat, drab breeches with patches, high collar and red tie, blue darned stockings, leather shoes, hat trimmed with green and sprigs of shamrock.
Note: in the later (1887) edition, the costume is described as "An Irish car-driver."
Sources:
Holt, Ardern. Fancy Dresses Described, 2nd Edition, Illustrated. London: Debenham & Freebody, 1880.
Holt, Ardern. Fancy Dresses Described, 5th Edition. London: Debenham & Freebody, 1887.