Calendars of the Grants of Probate and Letters of Administration
Calendar of the Grants of Probate and Letters of Administration or CGPLA was an index published in the United Kingdom and Ireland that lists an alphabetical summary of probate documents such as wills. The correct full title for Ireland is Calendar of the Grants of Probate and Letters of Administration Made in the Principal Registry and in the Several District Registries 1858-1920.
Source: Wikipedia — Calendars of the Grants of Probate and Letters of Administration (CC BY-SA 4.0)