In 1703, Cromwell was courted by Anglo-Virginian planter
William Byrd II. While she travelled to Dublin with
Edward Southwell, the Secretary of State for Ireland, Byrd wrote a series of letters addressing Cromwell as 'Facetia' and himself as 'Veramour'. Byrd and Southwell were close friends at the time. Southwell's father,
Sir Robert Southwell, had secured Byrd's entry into the
Royal Society before dying in 1702. Cromwell's replies do not survive, but Byrd's outgoing letters (preserved and published by
Marion Tinling) show how he grew irritated as she stopped replying to his persistent and melodramatic letters. Byrd grew angry, lashing out at Cromwell's 'hibernian amuzement' and 'laziness', sabotaging any hopes of a successful courtship. On 29 October 1704, Cromwell married Edward Southwell in Ireland. Their son,
Edward Southwell, did not style himself Baron Cromwell of Oakham. Cromwell's grandson inherited the much older and more distinguished
Barony of Clifford as the title's 20th holder. ==Death==