John Camden Hotten, The History of Signboards, from the Earliest times to the Present Day
“ As the use of coaches gave rise to the sign of the Coach and Horses, so the Sedan produced some signs, as the Sedan Chair, Broad Quay, Bristol; North Searle, Newark; the Two Chairmen, &c., Warwick Street, Cockspur Street, and other parts of London; and the Three Chairs in the seventeenth century, a famous tavern in the Little Piazza, Covent Garden. The Sedan, says Randle Holme, “is a thing in which sick and crazy persons are carried abroad, which is borne up by the staves by two lusty men.” ”
