Mary Anne Disraeli

Mary Anne Disraeli, 1st Viscountess Beaconsfield (11 November 1792 – 15 December 1872) was a British was a British peeress, a society figure and the wife of then United Kingdom Prime Minister Benjamin Disraeli. She was known for her honesty and uninhibited remarks, which often scandalised the staid Victorians.

In 1868, as her husband introduced the Corrupt Practices Act which was meant to end electoral bribery, the British Templars plotted to kill Disraeli to stall the implementation of the act. The Templars hired men to kill Disraeli while he was in his carriage with his wife but the plot was foiled by the Assassin Jacob Frye posing as their new bodyguard. After the attack, when Frye asked to Mary if she knew of a politician wearing a cavalry uniform, Lady Disraeli impressed by the Assassin told him that she would help him in his inquiry if he escorted her while touring the Devil's Acre, one of the poorest and most dangerous district of the city.

The next evening, as agreed Jacob met the curious woman and after escaping scandal-hunting journalists took her to the Devil's Acre. While touring the place, the Assassin saved her dog from being stolen by a Blighter and then took care of the rest of his friend before taking back Mary to Downing Street. Having satisfied her curiosity, Lady Disraeli told Jacob that the mysterious "B" he was looking for was in fact James Brudenell, 7th Earl of Cardigan.

Reference

 * Assassin's Creed: Syndicate Gameplay Walkthrough