Messange, Recherches sui la Population, p.

186.] [Footnote 56: A learned slave sold for many hundred pounds sterling: Atticus always bred and taught them himself.Cornel.Nepos in Vit.

c.
13, [on the prices of slaves.

Blair, 149.]--M.] [Footnote 57: Many of the Roman physicians were slaves.

See Dr.
Middleton's Dissertation and Defence.] [Footnote 58: Their ranks and offices are very copiously enumerated by Pignorius de Servis.] [Footnote 59: Tacit.Annal.xiv.43.They were all executed for not preventing their master's murder.