Mathew lived in a rented house in Portmarnock, Dublin for a number of years, where she entertained.
In 1772 to 1773 Mathew kept a daily diary, along with highly detailed accounts spanning 20 years were published in 1991.
[1] Her diary details a comfortable life, with outings of card-playing, balls and to the theatre.
She kept the diary dutifully from 1 August 1772 until 31 July 1773, not enjoying the pursuit, but wanting to adhere to the discipline of writing every day.
Whilst not containing any literary merit, her diary is a historically rare and useful glimpse into the life of an 18th century Irish spinster socialite.