A centuries-old silver hoard unearthed at a nuclear site on the Suffolk coast highlights the fragility of history under our feet. During the Sizewell C excavations, archaeologists found a tightly wrapped bundle of silver pennies that had remained hidden for roughly a thousand years, untouched by daylight.
The hoard, consisting of about 320 coins, would have been a substantial stash—enough to buy around sixteen cows in its day.
These coins were minted between 1036 and 1044, a period when English royal authority shifted from Danish-born rulers back to the native line. The discovery was led by Alexander Bliss, a coin specialist with Oxford Cotswold Archaeology, an organization spearheading many Sizewell C excavations. Bliss’s work centers on late Anglo-Saxon England—the final era before the Norman Conquest—and on what coinage can reveal about daily life.
The Sizewell coins were found where two early medieval field boundaries met, suggesting they were deliberately buried rather than casually dropped. For a peasant or craftsman, such a bundle would have equaled far more than ordinary spare change. Researchers believe the hoard likely belonged to a person of local status, perhaps a prosperous farmer who could amass savings.
Early English law codes valued an ox at a mancus and a cow at twenty pence in London. A mancus was a small gold coin used for important payments, and the contemporary penny, though small, carried real purchasing power.
Tracing power and politics, the Sizewell coins cover the brief reigns of Harold Harefoot, his half-brother Harthacnut, and the newly crowned Edward the Confessor. Their dates align with a turbulent transition when Danish influence waned and the older English royal line resurfaced. By this era, a system of regular recoinage kept each penny design in circulation only for a few years, as authorities replaced older coins with new designs.
Among the coin designs are Harold I’s Jewel Cross, Harthacnut’s Arm-and-Sceptre, and Edward the Confessor’s PACX, each tied to a narrow window of years. Such precise dating helps archaeologists use coin hoards as time markers when written records are sparse. The silver pennies of this period were light, practical discs that held real purchasing power in compact form, with estimates suggesting a penny weighed about one and a half grams and could buy basic goods.
Every Sizewell coin bears tiny inscriptions naming its mint, the official workshop that struck it, and the moneyer responsible for the production. This combination converts a single coin into a ledger linking the king’s image to a specific town and individual. The moneyer’s role was a trusted position—administrative to run workshops, hire workers, and purchase silver—creating a local power base and profit, with penalties for shortchanging the crown.
The hoard’s pennies originate from more than thirty mints, weaving a network that fed silver into the economy. Nearly half come from London, with others traced to Norwich, Thetford, Lincoln, and even distant Somerset. The Jewel Cross pennies of Harold I feature a portrait on one side and a cross motif on the reverse, a design that aided quality control and made forgeries easier to detect.
The timing of the burial—after Edward the Confessor’s accession in 1042—reflects shifting loyalties and rising unease among landowners. Edward’s early years included expulsion of nobles and seizure of property, prompting fear of political reversal. Bliss notes that three separate hoards dating to 1042–1044 are known from across England, suggesting a broader climate of anxiety and precaution. The owner likely never retrieved the coins, whether due to death, exile, or relocation from home.
What endures is a snapshot of one individual’s decision-making and a window into how money, power, and fear intersected in 11th-century England.
Images: Cotswold Archaeology.
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