James Smith Reid, Encyclopædia Britannica, Ninth Edition (1888)
“ The emperor now indicated clearly his expectation that Tiberius would be his principal successor. The two essential ingredients in the imperial authority—the proconsulare imperium and the tribunicia potestas—were conferred on Tiberius, and not on Agrippa, who was too young to receive them. Tiberius's career as a general now began anew. In two or three safe rather than brilliant campaigns he strengthened immensely the Roman hold on Germany, and established the winter camps of the legions in the interior, away from the Rhine. ”
