Correspondence relating the seismic observatory at Rathfarnham Castle and to the transfer of the ‘O’Leary Seismograph’ to the museum at Maynooth College. Includes letters by Fr Richard E. Ingram SJ, Dr Thomas Murphy, Dublin Institute for Advanced Studies, and Irish Fr Provincial Patrick Doyle.

A file of letters from Fr Thomas Gartlan SJ to Irish Fr Provincial concerning the Australian Mission, his position as Rector of St Ignatius College, Riverview, Sydney (appointed 15 July 1913). Includes a letter referring to the seismological observatory. Remarks that capable men are needed to take charge of the observatory '...Fr Pigot is doing his best to get away - to Japan I think - and in any case - though very capable - he is such a bundle of nerves - that he cannot deal properly with any assistant he engages to help him. In consequence of this and his own very indifferent health - the observatory work is hopelessly in arrears. Moreover for want of funds we have been unable to roof in properly the seismological tunnel...' (24 August 1911, 4pp). Includes a letter referring to a grant from the NSW government to Fr Pigot for the purchase of a new Russian seismograph. (5 September 1916, 1p).

A file relating to the seismograph in Rathfarnham Castle. Includes letters from Fr William O'Leary SJ to Irish Fr Provincial Thomas V Nolan SJ concerning the construction of the seismograph.

Notebooks concerning the workings and the measurements of ‘The O'Leary Seismograph’ at Rathfarnham Castle, Dublin. The first notebook (1946-1957) includes diagrams and details of the pendulum, suspension: trifilar workings of the seismograph. Includes inserts: ‘Fr M Murphy was present and helped erect the pendulum. He was in Rathfarnham, for (at worst) October 1916 to September 1917. Fr Hayes was also present. Fr O'Connell says 1915 work was started’; note from Fr Richard Ingram SJ to Mr Patrick Heelan SJ inviting him to measure the static mag. of O’Leary’. The second notebook records the measurements of the seismograph at Rathfarnham Castle (4 January 1948-May 1953). It has the names of Jesuit Juniors John Moore, Michael Kelly, Hubert Delaney, Albert Diviney and Paul McShane. Notebooks found in the basement (villa room) of Milltown Park, 2014.

Seismograph diary for Rathfarnham Castle, Dublin. Includes cuttings from news-papers reporting on various earthquakes around the world.

A file relating to the seismological observatory at St Ignatius' College, Riverview, Sydney. Includes letters and reports by Fr Edward Pigot SJ concerning the observatory and his work there to Irish Fr Provincial; Letter from and Sir Tannatt William Edgeworth David,

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