Her seventeen-volume diaries document 47 years of life in the Georgian era, covering the period from 1773 to 1830.

[1] She was the eldest of three surviving children born to Clarissa Catherine de Hochepied and James Porter, the British Ambassador to the Ottoman Empire.

[3] When she was eighteen, Larpent published a 32 page account of the bigamy trial of Elizabeth Pierrepont, Duchess of Kingston-upon-Hull at Westminster Hall that gathered 4,000 spectators.

[1] On 25 April 1782 she married John Larpent, a widower who she hoped would care for her and younger sister Clara who she had adopted.

From his first marriage, he was a father of Francis Seymour Larpent, who later served as Judge-Advocate General of the British Army.