Galba

Thus was Vitellius proclaimed emperor in Germany; and when Galba learned of the revolution there he no longer deferred his act of adoption. Knowing that some of his friends favoured the selection of Dolabella, and most of them that of Otho, neither of whom was approved by himself, he suddenly, and without any previous notice of his intention, sent for Piso (whose parents, Crassus and Scribonia, had been put to death by Nero),

a young man in whose predisposition to every virtue the traits of gravity and decorum were most conspicuous; then he went down to the camp to declare him Caesar and heir to the throne. And yet as soon as he set out, great signs from heaven accompanied him on his way, and after he had begun to pronounce and read his address to the soldiers, there were many peals of thunder and flashes of lightning, and much darkness and rain pervaded both the camp and the city, so that it was plain that the act of adoption was inauspicious and was not favoured or approved by the heavenly powers.