sentences:  His hopes were dashed when his colleague Constantius died at York in 306 and the legions elevated his son Constantine to the position of Augustus.Galerius only discovered this when he received a letter from Constantine, who informed him of his father's death, modestly asserted his natural claim to the succession, and respectfully lamented that the enthusiastic violence of his troops had not allowed him to obtain the imperial purple in the regular and constitutional manner.The first emotions of Galerius were those of surprise, disappointment, and rage, and as he could seldom restrain his passions, he threatened to burn both the letter and the messenger.