He received the ‘castle, town and lands of Clonnoghan alias Cloneboghan and Coolefoble’, as recorded in the Calendar of Patent Rolls for Ireland during the reign of James I. This grant formed part of the wider plantation scheme that redistributed Irish lands to English and Scottish settlers during the early 17th century.

The castle at Clonymohan would have been a typical tower house or fortified residence of the period, likely built by an earlier Irish or Anglo-Norman family before changing hands during the plantations. These structures served both defensive and residential purposes, providing security in uncertain times whilst also demonstrating the status and authority of their owners. The multiple name variations; Clonnoghan, Cloneboghan, and the modern Clonymohan; reflect the anglicisation of Irish place names that occurred during this period of colonial administration.

Today, visitors to the site will find no visible traces of Fisher’s castle above ground. The structure has been completely levelled, its stones likely robbed for use in later buildings or field walls, a common fate for many of Ireland’s medieval and early modern castles. Whilst the physical structure has vanished, the documentary evidence preserved in the patent rolls provides a glimpse into this corner of County Offaly’s plantation history, when ancient Irish territories were reorganised and renamed under English rule.