Letters from a Stoic 83 : 15

I fancy that it was because Piso's drunkenness turned out well for the Emperor that he appointed to the office of city prefect Cossus, a man of authority and balance, but so soaked and steeped in drink that once, at a meeting of the Senate, whither he had come after banqueting, he was overcome by a slumber from which he could not be roused, and had to be carried home. It was to this man that Tiberius sent many orders, written in his own hand, – orders which he believed he ought not to trust even to the officials of his household. Cossus never let a single secret slip out, whether personal or public.