This letter is thus endorsed by successive postmasters, according to the existing custom.

So that his Grace's letter, which would appear to have been so important as that one or more messengers were required to travel night and day in order to deliver it at the earliest possible moment, took 40 hours to travel 63 miles.

FOOTNOTES:

[1] Xenophon.

[2] Herodotus.

[3] Travels of Marco Polo, pp. 139, 140.

[4] Camden's Annals.

[5] Froude's History, Vol. III. p. 185.