The collection comprises primarily correspondence between Frank Aiken, IRA Chief of Staff; Mr McAuliffe Acting Officer Commanding Limerick Brigade IRA; and Maurice Twomey Inspecting Officer. They are almost solely concerned with the reorganisation of the IRA command structure in Limerick, Clare and Kerry owing to the shortage of men and equipment during and following the Civil War.

The material contains primarily correspondence, petitions and resolutions created and generated by Thomas Spring Rice during his political career.