The earliest dated handwritten document from Britain has been unearthed in the heart of London, archaeologists announced on Wednesday, among a trove of Roman writing tablets revealing the city's commerce-driven beginnings.

The wooden tablet, a notice of debt owed dated January 8, 57 - less than 14 years after the Roman invasion of 43 - was found deep beneath what is now the City of London financial hub.

The 405 tablets also contained the earliest surviving written reference to London.

They reveal correspondence requesting payments, boasting of money-lending, asking favors to be returned, litigation requiring a judge and also evidence of someone practicing the alphabet.

"It was like the e-mail of the Roman world," said Sophie Jackson, director of the Museum of London Archaeology which led the dig.

The tablets were found during excavation for financial news agency and data provider Bloomberg's new European headquarters by the Bank of England.

Romans used waxed writing tablets for note-taking, accounts and legal documents. Writing was carved into the wax, and sometimes the scratches were deep enough to score the wood beneath.

The wood survived because the tablets were buried in the mud of the River Walbrook, which now exists as a boggy streak of earth 12 meters below the modern city.

Previously only 19 legible tablets had been found in London. Of the 405 discovered under the new Bloomberg building, 87 have been deciphered.

Roger Tomlin, the classicist and cursive Latin expert who deciphered the inscriptions, was the first person to read them again after more than 19 centuries.

"It's like code-breaking," he said.

The tablets reveal the names of nearly 100 people, from a brewer to a judge, soldiers, slaves and freed slaves making their way in business.

They show early London was inhabited by businessmen and soldiers, many from Gaul and the Rhineland. None were women.

On one dated to circa 65-80 is written "Londinio Mogontio", or "In London, to Mogontius", a Celtic personal name, and is the earliest reference to London by 50 years.

"The tablets are hugely significant," said Jackson.

"They are the largest single assemblage of wax writing tablets found in Britain and what's particularly special about them is they are so early."

She said they allowed us to hear "the voices of the very first Londoners".

The earliest tablet, found in a layer dated 43-53, refers to people "boasting through the whole market that you have lent them money".

(China Daily 06/03/2016 page12)