in Had.

&c.) This edict was subsequently obeyed; for the emperor Valerian, in a letter addressed to Mulvius Gallinnus, praetorian praefect, excuses himself for having violated it in favor of the young Probus afterwards emperor, on whom he had conferred the tribunate at an earlier age on account of his rare talents.

(Vopisc.

in Prob.

iv.)--W.
and G.Agricola, though already invested with the title of tribune, was contubernalis in Britain with Suetonius Paulinus.Tac.Agr.