 A more comprehensive text , presumed to describe the life of <unk> in closer detail , is the <unk> , by the contemporary historian <unk> . The <unk> is an account of the history of Rome covering three decades from the suicide of emperor <unk> in 69 until the death of <unk> in 96 . Unfortunately , a substantial part of the work has been lost , with only the first five books covering the Year of the Four <unk> remaining . In the introduction to his biography of <unk> Julius <unk> however , <unk> speaks highly of <unk> , describing his reign as " the dawn of a most happy age , [ when ] <unk> Caesar blended things once <unk> , sovereignty and freedom " . 
