To collect, to dispose, and to adorn a series of fourscore years, in an immortal work, every sentence of which is pregnant with the deepest observations and the most lively images, was an undertaking sufficient to exercise the genius of Tacitus himself during the greatest part of his life.

In the last years of the reign of Trajan, whilst the victorious monarch extended the power of Rome beyond its ancient limits, the historian was describing, in the second and fourth books of his annals, the tyranny of Tiberius; and the emperor Hadrian must have succeeded to the throne, before Tacitus, in the regular prosecution of his work, could relate the fire of the capital, and the cruelty of Nero towards the unfortunate Christians.

At the distance of sixty years, it was the duty of the annalist to adopt the narratives of contemporaries; but it was natural for the philosopher to indulge himself in the description of the origin, the progress, and the character of the new sect, not so much according to the knowledge or prejudices of the age of Nero, as according to those of the time of Hadrian.

3 Tacitus very frequently trusts to the curiosity or reflection of his readers to supply those intermediate circumstances and ideas, which, in his extreme conciseness, he has thought proper to suppress.

We may therefore presume to imagine some probable cause which could direct the cruelty of Nero against the Christians of Rome, whose obscurity, as well as innocence, should have shielded them from his indignation, and even from his notice.