[Footnote 23: Saserna, in Gaul, and Columella, in Italy or
Spain, allow two yoke of oxen, two drivers, and six
laborers, for two hundred jugera (125 English acres) of
arable land, and three more men must be added if there be
much underwood, (Columella de Re Rustica, l. ii. c. 13, p
441, edit. Gesner.)]