They had a son Flight Lieutenant Henry Longfield Beatty, born while they were living in Warwickshire, England on 4 March 1901.
[3] Lett believed, as did the organisation she helped to create, that a woman's place was in activism and the public sphere especially in areas like the Poor Law Guardians and local elected officials responsible for women's work and children's welfare.
At the first meeting Lett discussed the importance of healthcare, education, fashion, horticulture, the rearing of children and the dullness of rural Ireland.
With Lett's support the organisation was also instrumental in building clubs for women to play camogie.
[4] Supporting her belief in the value of games for girls, Lett was the trainer for the Davidstown/Bree camogie team which won the district final in 1913.