READ: Lord Lucan's wife's unsettling personal letters revealing torrid family life with the infamous Earl who she says was 'paranoid' before nanny Sandra Rivett's death

Five decades ago, the 7th Earl of Lucan vanished without a trace after his children's nanny was found bludgeoned to death at his home in Belgravia, London. Richard John Bingham - also known as Lord Lucan - disappeared on November 8, 1974, leaving behind his three young children and estranged wife. Richard John Bingham - also known as Lord Lucan - disappeared on November 8, 1974, leaving behind his three young children and estranged wife Veronica Lucan, wife of the missing Lord Lucan, who disappeared following the murder of their nanny Prior to his disappearance, Lord Lucan had been facing a series of personal struggles prior, including a gambling addiction, spiraling debt, and a bitter custody battle that further led to an unhealthy fixation on his wife. Lord Lucan's disappearance is particularly mysterious, as the culprit behind Sandra Rivett's grisly death has never been caught, leading many to believe or suggest the Earl may have been responsible - including his own wife Pictured: Lord Lucan's nanny, Sandra Rivett, who was found dead in the family home on November 7, 1974 Lady Lucan in 'Lord Lucan: My Husband the Truth' TV Series - Jun 2017 Lord Richard John Bingham with Veronica Duncan on the day their engagement was announced in 1963 The typed letters were uncovered by builders working on the family guest house in Belgravia that Lady Lucan, who died last year, moved in to in 1977. She complains about several 'defamatory and inaccurate' accusations in The New Review article Lady Lucan described herself as a 'perfectly normal person whose marriage went wrong mainly due to financial problems' In this letter, Lady Lucan's solicitor replies to her instruction to sue the publishers of The New Review Notes about Lady Lucan's legal case against The New Review, including several games of noughts and crosses at the bottom The aristocrat also wrote about how her life spiralled into isolation as she was palmed off by her former friends after her split from Lord Lucan.