Cassius Dio told us an interesting story related to Trajan.
Trajan, before he became emperor, had had a dream of the following nature. He thought that an old man in a purple-bordered toga and vesture and with a crown upon his head, as the senate is represented in pictures, impressed a seal upon him with a finger ring, first on the left side of his neck and then on the right.
The day Trajan was declared emperor, the first thing he did was send a letter to the Senate saying that he would not kill or deprive any senator of his rights. His rule was reasonable and in harmony with the Senate.
Cassius Dio, Roman history, LXVIII.5
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