In 1992, Robin Birley made arguably the most important find in British archaeological history when he uncovered a huge trove of soldiers’ letters from the Roman fort of Vindolanda, near Hadrian’s Wall.As scholars picked through the well-preserved accounts of legionnaire life on the edge of empire, a star character emerged: Masclus, and in particular, his demands for more beer.Now, 25 years later, Birley’s son Andrew claims to have discovered another haul of correspondence, which again appear to include written demands from the same Roman cavalry officer – except this time he wants to go on holiday. This is the find I have been hoping for all my working lifeAndrew Birley, Archaeologist Vindolanda from the airCredit:Telegraph Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings. Many of the letters are written on slivers of birchCredit:Telegraph “My father has been rather poorly recently, but by the time I got home he had cracked open a bottle of champagne.”Most of the hundreds of letters already found at Vindolanda, near Bardon Mill on Northumberland, are in the care of the British museum, with a handful on loan at the ruined fort.They are considered some of the most famous existing documents from the Roman world, remarkable for their highly personal, warts-and-all account of army life. Archaeologists had to dig deep trenches to find the latest haulCredit:Telegraph The large oak-leaved document is currently illegible and the ink faded, but it is hoped the writing will be deciphered with use of infrared.The Bloomberg find comprise 405 well preserved wooden tablets found at the site of what is now the London offices of the financial data company.The earliest written documents found in Britain, they were found 40 feet underground following the demolition of a 14-storey office block which was built in 1953.The site had been partly excavated in the 1950s, but it was only after 2010 archeologists were able to dig properly. The new letters, believed to originate in the 1st Century AD, were found in a trench at the deepest level of the complex, which was repeatedly rebuilt over the years with turf and timber.Mr Birley said: “They were spaced out at regular intervals along the line of a trench, under a rubble-filled foundation layer.“We wondered if somebody was carrying them in a bag with a hole in one corner, or if somebody had been walking along reading them and chucking them away one by one.”While the Vindolanda letters are believed not to be as old as the Bloomberg Tablets, which were discovered in London between 2010 and 2013, they are more intimate in nature.“There is nothing more exciting than reading these personal messages from the distant past,” said Mr Birley. “These are not Post-It notes.“These were written when somebody had something of importance to communicate.” The new cache of 25 letters were found last month in the deepest level of the fort complex and are now being conserved ahead of scanning with infrared lights.This should make the now faint ink marks legible, but experts already believe they have discovered a written request from Masclus, asking for leave from his duties.Most of the missives are, like those of the original big find, written on thin sheets of birch, however experts are particularly excited about a double-leaved oak tablet, which indicates it contains important correspondence. “This is the find I have been hoping for all my working life,” said Andrew Birley, who was a teenager when his father discovered the main haul, and now leads the trust which owns the site.