His wife Celia is descended from 11 successive generations of Irish clergy.
While the Irish clergy and their supporters refuted these claims, popular opinion seemed to overshadow their arguments.
Brady arrived in 1838 in Sydney with the first large group of secular Irish clergy to reach Australia.
Given the significant degree of independence in the Celtic Church, some Irish clergy quarrelled.
To maintain sovereignty over the general Irish clergy, the major Sees were filled by Normans.
The native Irish clergy often appealed to Rome to confirm the more controversial nominations.
The Irish clergy in turn appealed to Rome to confirm their nomination.
From 1911 to 1914, the Irish high clergy made successive attacks on the trade union movement and on socialism.
As a result, many Irish clergy left Northumbria and returned to Ireland.
Duchal is also known as a biographer of Irish non-subscribing clergy.