By the gap in a hedge bordering the entrance off a muddy lane in Hampshire, the young diggers on one of the most fascinating archaeological sites in Britain have made a herb garden: four small square plots. The sudden blast of sunshine after months of heavy rain has brought everything into bloom, and there's a heady scent of curry plant and dill, marigold and mint.
Many of the plant seeds are familiar from Roman sites across Britain, as the invaders brought the flavours and the medical remedies of the Mediterranean to their wind-blasted and sodden new territory, but there is something extraordinary about the seeds from the abandoned Iron Age and Roman town of Silchester.
The excavation run every summer by Dr Amanda Clarke and Professor Michael Fulford of the archaeology department at Reading University, using hundreds of volunteer students, amateurs and professionals, now in its 15th season, is rewriting British history.
The banal seeds are astonishing because many came from a level dating to a century before the Romans. More evidence is emerging every day, and it is clear that from around 50BC the Iron Age Atrebates tribe, whose name survived in the Latin Calleva Atrebatum, the wooded place of the Atrebates, enjoyed a lifestyle that would have been completely familiar to the Romans when they arrived in AD43.
Their diet would also be quite familiar to many in 21st-century Britain. The people ate shellfish – previously thought to have been eaten only in coastal settlements – as well as cows, sheep, pigs, domesticated birds such as chicken and geese as well as wild fowl, and wheat, apples, blackberries, cherries and plums. They ate off plates, again previously thought a finicky Roman introduction, and flavoured their food with poppy seed, coriander, dill, fennel, onion and celery. They had lashings of wine, imported not just in clay amphorae but in massive barrels, and olive oil.
And they had olives. One tiny shrub in the herb garden represents the recent discovery, news of which went round the world: a single battered, charred olive stone excavated from the depths of a well, the earliest ever found in Britain. All the Atrebates needed for the perfect pizza was tomatoes to arrive from the new world.
They had other luxury imports, too: glass jugs and drinking glasses, gold from Ireland, bronze jewellery and weapons from the continent, beautiful delicate pottery from Germany and France.
They also had town planning, another presumed later introduction. The Romans were undoubtedly better road engineers; in the torrential rain earlier this summer, their broad north-south road, built with a camber and drainage ditches, stayed dry, while the Iron Age road turned into a swampy river. But the evidence is unarguable: the Iron Age people lived in regular house plots flanking broad gravelled roads, aligned with the sunrises and sunsets of the summer and winter solstices, in a major town a century earlier than anyone had believed.
They feared gods who demanded sacrifices as startling as anything in a gothic novel. Ravens have been found buried across the site, as well as dozens of dog burials, not just slung into a well or cesspit but carefully buried, often with other objects, one with the body of an infant, one standing up as if on guard for 2,000 years. Another tiny skeleton, no bigger than a celebrity's handbag dog, was one of a handful ever found in Europe from such an early date: the evidence suggests it lived for up to three years, and was then laid curled as if asleep into the foundations of a house. Only last Friday the skeleton of a cat turned up, carefully packed into a clay jar.
Part of a folding knife carved in exquisite detail from elephant ivory and found at Silchester. A unique folding knife showing two dogs mating, another fabulously expensive import, was also deliberately buried."We are only just beginning to get a handle on all this, as our excavation is really the first ever major modern exposure of a late Iron Age town in Britain, and we still have a long way to go," says Fulford, who has been digging at Silchester since he was a junior lecturer in the 1970s, and expects the work to continue long after his day.
Fulford spends the winters brooding on each summer's finds, and has reached the conclusion, startling even to him, that the town was at its height of population and wealth before the Romans arrived.
He believes it was founded around 50BC by Commius, an Atrobates leader once a trusted ally of Julius Caesar, who then joined an unsuccessful rebellion against him and had to leave Gaul sharpish. Whether Commius headed for an existing Atrobates settlement at Silchester, or started to build on a greenfield site, a defensible hill with excellent views, near the navigable Kennet and Thames, is, Fulford suggests, "a million-dollar question – why here?" They have found nothing earlier than 50BC – yet.
Commius's town flourished, trading across Britain, Ireland and both Roman and Iron Age tribal Europe. The Callevans paid for their luxuries with exports of metalwork, wheat – the site is still surrounded by prime farm land, and there is evidence of grain-drying on an industrial scale – hunting dogs, and, almost certainly, slaves: British slaves and dogs were equally prized in continental Europe. They have also found evidence in little flayed bones for a more exotic craft industry, puppy-fur cloaks.
Commius was succeeded by three quarrelsome sons – significantly dubbing themselves on coins as "rex" or king – who successively deposed one another. The third, Verica, was toppled by local tribes and made a move that would change the course of British history: he fled to Rome and asked for help – and in AD43 the Romans came.
This summer the diggers are right down at the earliest Roman level, which suggests light, short-lived, possibly military buildings, in contrast with substantial pre-invasion structures including one massive rectangular house that may prove to be the largest Iron Age house in Britain. This week they are clearing a cesspit so neatly dug it must be military, so may soon know whether the Romans ate British wheat or Roman fish sauce.
Within 20 years, large parts of the town were torched, possibly in Boudicca's rebellion of 60-61AD. More Roman buildings followed, including baths, temples, a forum market place and a huge basilica, but it would take another two centuries before the Atrebates street grid was wholly abandoned for the Roman compass points.
People have been fascinated by Silchester for centuries: there are records of King John visiting in the 13th century, and an inscribed memorial stone was excavated in the 16th century. From the 1890s the Society of Antiquaries mounted a 20-year excavation that uncovered the heart of the Roman town (missing much beyond the reach of Victorian science) but in the 1860s and 70s the vicar of Stratfield Saye, the memorably named James Joyce, a passionate amateur antiquarian, had already conscripted local agricultural labourers as excavators, with the backing of his landlord, the Duke of Wellington.
A bronze eagle found at Silchester 1866. Photograph: All Rights Reserved/Copyright Reading Museum (Reading Borough Council) Joyce recorded his finds in beautiful watercolours, including the wonderful bronze eagle he found on 6 October 1866, the single most famous from the site. He interpreted it as a regimental standard, the pride and honour of its men, wrenched from its post and buried to save it from whatever disaster came in the scorched layer overlying it. The find inspired Rosemary Sutcliffe's 1954 novel The Eagle of the Ninth, and last year's Hollywood movie The Eagle.Fulford believes the bird, though wonderful, is actually part of a monumental sculpture of a god or an emperor, which escaped being melted down when the great basilica became a scrapyard and workshop.
The eagle is in a major gallery in Reading museum with wonderful finds from the site, but although the gallery was redisplayed only a few years ago, there is very little on the earliest years of Calleva Atrebatum: that story is only emerging from the ground now.
Some time between the fifth and seventh centuries, it all ended. Arguments break out regularly among the diggers about what happened: with the foundation and the Romanisation of the town, it is the third great research question that the excavation was set up to answer.
Jesse Coxey, a postgraduate archaeologist from Vancouver, who learned of the excavation while on a dig in Israel – "the folks there said you'd learn more in a fortnight at Silchester than in your entire degree course, and they were right" – still holds the traditional view that it was abandoned as the Roman empire began to disintegrate.
"I think the Romans just packed up and left – it was all falling apart, and if they didn't go then they'd be left behind. There might have been a few squatters afterwards, but basically that was it."
Clarke, after supervising the excavation of two noisome wells every season, up to six metres deep, and usually sodden and stinking at the bottom, wonders if they didn't eventually just poison all their water sources. "We've been digging down through wells which became latrines over older wells and older latrines, layer upon layer. There must have been enormous problems with contaminated water on a site like this with no river. Maybe finally they just ran out of new places to dig wells."
Whatever the cause, everyone left. They tumbled the walls of imposing civic buildings that had long since become workshops or cattle sheds, burying fine mosaic floors already scorched and cracked by fires lit directly on top of the subtle decoration. They filled in the wells. They may have cursed the site with ritual burials including pots symbolically "killed" by holes deliberately punched through them, so nobody else could live among the ruins.
Windblown soil filled the ditches and covered the paved roads, grass grew over the forum and the temple courtyards, and the great Iron Age hall, where once a tiny dog far from the land where it was born yapped for its share of the coriander-flavoured stew, became a low mound in a green field. Only the jagged broken teeth of the Roman brick and flint walls remained above ground.
Towns went on but Silchester didn't. The settlements reached by the Romans' main roads – Winchester, Dorchester, Cirencester, and Londinium far to the east – flourished. With the exception of one small medieval manor, now part of a farm, and the church of St Mary, which probably stands on a Roman temple, nobody ever built on or lived at Calleva Atrebatum to this day – except the archaeologists, who set up their tent city every summer, and resume the attempt to peel back the earth and time itself.
The site is owned by Hampshire County Council, and the walls, in the guardianship of English Heritage, are open every day of the year. The annual excavation is open free to the public every day except Friday until 12 August. On Saturday 4 August there will be guided tours, talks, displays of finds and demonstrations.
http://www.guardian.co.uk/uk/2012/jul/31/silchester-iron-age-roman-britain?INTCMP=SRCH
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