Suetonius, Tiberius 33
Little by little he unmasked the ruler, and although for some time his conduct was variable, yet he more often showed himself kindly and devoted to the public weal. His intervention was at first limited to the prevention of abuses. Thus he revoked some regulations of the senate and sometimes offered the magistrates his services as adviser, when they sat in judgment on the tribunal, taking his place beside them or opposite them at one end of the platform; and if it was rumored that any of the accused were being acquitted through influence, he would suddenly appear, and either from the floor or from the judge's tribunal remind the jurors of the laws and of their oath, as well as of the nature of the crime on which they were sitting in judgment. Moreover, if the public morals were in any way affected by laziness or bad habits he undertook to reform them.
Paulatim principem exseruit praestititque etsi varium diu, commodiorem tamen saepius et ad utilitates publicas proniorem. Ac primo eatenus interveniebat, ne quid perperam fieret. Itaque et constitutiones senatus quasdam rescidit et magistratibus pro tribunali cognoscentibus plerumque se offerebat consiliarium assidebatque iuxtim vel exadversum in parte primori; et si quem reorum elabi gratia rumor esset, subitus aderat iudicesque p342aut e plano aut e quaesitoris tribunali legum et religionis et noxae, de qua cognoscerent, admonebat; atque etiam, si qua in publicis moribus desidia aut mala consuetudine labarent, corrigenda suscepit.