Note 20 — Chapter I · GENERAL DIVISIONS AND FEATURES OF THE EMPIRE.
Reading edition
Voyages à Peking, Vol. II., p. 214. Compare the letter of a Jesuit missionary (Annales de la Foi, Tome VII., p. 377), who describes houses of rest on the wayside. These singular road-gullies of the loess region have been very thoroughly examined by Baron von Richthofen, from whose work the cut above is taken.