In the year 41 after Christ’s birth the short madness of Caligula’s dominion over the world was ended by his assassination in one of the long corridors of the Palatine. His uncle Claudius, the despised weakling of the imperial family, dragged forth trembling from his hiding-place behind a curtain, and to his intense surprise acclaimed as Augustus by the mutinous Prætorians: this was the man for whom by a strange destiny was reserved the glory of adding Britain to the Roman Empire. Yet Claudius, for all his odd ways, his shambling gait, his shaking head, his stammering speech, was by no means the mere fool whom his relatives, ashamed of his physical deficiencies, had affected to consider him. He wrote in countless books the story of his imperial ancestors and his own; he knew the old Etruscan tongue, a knowledge, alas! now lost to the world, and translated treatises written therein; he cleared out the harbour of Ostia; he planted flourishing colonies; he brought water to Rome from the Æquian hills by the aqueduct which bears his name. Could the poor timorous old man have ventured to rely on himself, and to act on his own initiative, his name had perhaps been revered as that of one of the best emperors of Rome. It was his reliance on his wives and his freedmen, the government of the boudoir and the servants’ hall, which ruined his reputation with posterity.

It was probably in the same year in which Claudius succeeded to the empire, or it may have been a year later, that old King Cunobelinus died in Britain and was succeeded by his two sons, Caratacus[7] and Togodumnus. There was, as usual, an exiled prince (whose name was Bericus) claiming Roman assistance for his restoration to his country, but whether he was one of the sons of Cunobelinus or not, neither history nor the coins inform us. The petition of the exiled Bericus was granted by Claudius, and an expedition was resolved on, nominally for his restoration (from this point onwards his name disappears from history), in reality for the conquest of Britain (A.D. 43). The command of the expedition was entrusted to Aulus Plautius, a senator of high rank—he had been consul fourteen years before with the Emperor Tiberius—and was possibly a kinsman of Claudius by marriage. Under his orders marched four legions[8]:—

The Second: Augusta.
The Ninth: Hispana.
The Fourteenth: Gemina Martia; and
The Twentieth: Valeria Victrix.

All of these but the Ninth were withdrawn from service in Germany, and that legion came from Pannonia, in modern language Hungary west of the Danube. The Second and the Twentieth legions found a permanent home in our island; the Ninth, a grave; the Fourteenth after a brilliant career was withdrawn to Italy after about twenty-five years of British service. We have no exact statement of the number of the army of Plautius. The legions, if at their full complement, should stand for 20,000 men: the cavalry and cohorts of the allies should at least double that number. We are probably not far wrong in putting the invading force at 50,000, but the difficulty of forming an exact estimate is shown by the divergence between the calculations of two such experts as Mommsen and Hübner, the former of whom reckons the total at 40,000, and the latter at 70,000 men.

Not without great difficulty (says our sole authority, Dion Cassius) was the army induced to depart from Gaul. The soldiers grumbled sorely at being called to do military service “outside of the habitable world,” and Claudius deemed it advisable to send to them his freedman-minister Narcissus to overcome their reluctance. The glib-tongued Greek mounted the general’s rostrum and began to harangue them greatly to his own satisfaction. But it was too much for the patience of the veteran legionaries to hear this imperial lackey, this liberated slave, preaching to them about their military duty. They shouted him down with a well-concerted cry of Io Saturnalia (Hurrah for the slaves’ holiday), and then with the curious illogicality of soldiers they turned to Plautius and said that for his sake they would willingly follow wherever he led them. All this hesitation had caused considerable delay, but at last the flotilla bearing the soldiers embarked in three divisions, in order that the whole expedition might not be put to the hazard of a single landing. The soldiers were much disheartened when they found the winds or the tides apparently drifting them back to the port from which they had started, but then a meteor flashing from east to west seemed to indicate that their voyage would be prosperous and encouraged them to proceed. Their landing, or, more properly speaking, their three landings, were accomplished without difficulty, for the Britons, believing that the expedition was postponed on account of the mutiny, had made no preparations, and now fled to the forests and the marshes, hoping that the experience of the great Julius would be repeated and that this expedition also might soon return empty-handed.

Plautius had therefore hard work to discover his foe, but he did at last come to close quarters, first with Caratacus and then with Togodumnus, both of whom he overcame. Either now or in the following operations, Togodumnus perished, but his brother survived to be for many years a thorn in the side of the Roman general. A British tribe named the Boduni, of whose geographical position we are ignorant, but who were subjects of the Catuvellauni, came in and offered their submission. Plautius left a garrison among them and marching forward arrived at the banks of a river, possibly the Medway, which the barbarians fondly hoped could not be traversed without a bridge. The Roman general, however, had in his army many Gaulish soldiers, probably those dwelling near the mouths of the Rhine and the Waal, who were accustomed to swim with all their armour on across the swiftest streams. These men, at the word of command, plunged into the river, swam across, attacked the dismayed and carelessly encamped barbarians, and directing their weapons especially against the horses harnessed to the chariots made the usual cavalry tactics of the Britons impossible. The young Vespasian (future emperor, and conqueror of the Jews) and his brother Sabinus were ordered to lead some more troops across the stream and complete the victory, which they did, slaying multitudes of the barbarians. Still the Britons made a stubborn resistance, till at last an officer named Cnæus Hosidius Geta, a kind of Roman paladin who had before this done knightly deeds in fighting against the Moors, almost single-handed and at the imminent risk of capture, achieved a victory which compelled them to retire, and for which he received the honours of a triumph.

Hereupon the Britons withdrew behind the Thames, at that time and place a broad and shallow stream flowing wide over the marshes of Essex. The barbarians knew well its deeps and its shallows, and could find their way across it in safety. Not so the Romans, who suffered severe loss in attempting to follow them. As a mere question of strategy Plautius could probably have marched up the stream and crossed it at some narrower part of its course. He determined, however, to reserve this achievement for the emperor who had apparently already arranged to visit Britain and pluck the laurels planted for him by his general. Claudius prepared reinforcements, including, we are told, a number of elephants (not very serviceable, one would have thought, in the Essex marshes), sailed from his own port of Ostia to Marseilles, then travelled, chiefly by water, up and down the great rivers of Gaul, arrived at the camp of Plautius, crossed the Thames, the proper appliances having no doubt been prepared by the loyal general, and then marched on Camulodunum, which he took, making the palace of Cunobelinus his own. The fall of the powerful kingdom of the Catuvellauni brought with it the submission, voluntary or forced, of many neighbouring tribes.

Claudius was saluted not once but many times as Imperator by his soldiers, and returning to Rome after a six months’ absence he was hailed by the Senate with the appellation of Britannicus, an honour which was also bestowed on his six-year-old son. He rode in his triumphal chariot up to the capitol, and he erected some years later in honour of this conquest a triumphal arch which spanned the Via Lata (now the Corso), and which was still standing almost perfect till the seventeenth century, when it was destroyed (1662) by Pope Alexander VII. Some fine sculptured slabs from this arch are still preserved in the Villa Borghese at Rome, along with fragments of an inscription which record that “Tiberius Claudius Augustus, Germanicus and Pious, tamed the Kings of Britain without any loss [to the republic], and was the first to bring her barbarous races under the control of Rome”.

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The capture of Camulodunum involved the downfall of the house of Cymbeline, and the acceptance, at any rate the temporary acceptance, of Roman domination in all the south-eastern part of Britain. While Caratacus escaped to South Wales and there organised a desperate resistance to the Roman arms among the Silures, most of the smaller British chieftains seem to have bowed their necks beneath the yoke. An inscribed stone still standing in Goodwood Park, but originally found at Chichester, seems to record the building of a temple to Neptune and Minerva for the safety of the imperial house, at the command of King Tiberius Claudius Cogidubnus, “legate of Augustus in Britain”. This inscription is an interesting confirmation of the statement made by Tacitus that “certain cities were handed over to King Cogidubnus who remained till our own day most faithful to the emperor, according to the old and long-established custom of the Roman people to make even kings the instruments of their dominion”.[9]