
Surviving diaries and accounts of activities in Offaly (King’s County) in the nineteenth century are uncommon and because of this all need to be catalogued and evaluated. Diaries of travel writers, correspondence and memoirs can all throw light on activities of that time. One such source recently acquired by the Offaly Historical and Archaeological Society for its library is Reminiscences and Letters of Sir Robert Ball edited by his son W. Valentine Ball and published in 1915. It sets the scene for the intellectual milieu in which the children of the third earl of Rosse grew up and provides further information on the construction of the great telescope. Recently, a history of the building of the telescope was reprinted by Cambridge University as a cheap paperback while the Royal Society hosted a lecture on the ‘Leviathan of Parsonstown’ now available as a podcast.