Every Irish family historian eventually runs into the wall of 30 June 1922, the day the Public Record Office at Dublin's Four Courts went up in flames during the Irish Civil War. We told the story of that day in our article on Ireland's lost records and the Four Courts fire. This post is the practical sequel: when a record you need was destroyed, what do you use instead? Genealogists have spent a century building workarounds, and some of them are surprisingly good.
Quick Answer: What Replaces the Burned Irish Records?
For the lost censuses of 1821–1851, researchers use "census substitutes" — Griffith's Valuation, the Tithe Applotment Books, and surviving census fragments. For destroyed wills, indexes and abstracts made before 1922 survive, especially the Betham abstracts. For lost Church of Ireland registers, local copies and transcripts often exist. The Virtual Record Treasury of Ireland is now reassembling digital reconstructions of the destroyed archive.
What Are Census Substitutes?
Because the pre-1861 census returns burned almost completely, Irish research leans on records that captured the same population another way:
- Griffith's Valuation (1847–1864): a nationwide property valuation naming heads of household, their landlords, and their holdings. For the famine generation it is the closest thing to a census that survives, and it is free to search online.
- Tithe Applotment Books (1823–1837): lists of occupiers of agricultural land compiled for church tithes. Coverage is patchy — town dwellers and the landless are missing — but for rural families it reaches a generation earlier than Griffith's.
- Census fragments: pieces of the 1821–1851 returns survive for scattered parishes, particularly in counties Cavan, Galway, Meath, and Fermanagh. Always check whether your parish is among the lucky ones.
- 1841/1851 census search forms: when old-age pensions began in 1908, applicants born before civil registration had to prove their age, so officials searched the then-intact censuses and recorded the results. Those pension search forms survive and preserve details from returns that later burned.
How Do You Replace a Destroyed Will?
Original wills proved before 1904 were nearly all lost, but the paperwork around them was not:
- Calendars of Wills and Administrations (1858 onward): printed annual indexes summarising every probate — name, address, date of death, executors, and estate value. These survive complete.
- Betham's genealogical abstracts: Sir William Betham abstracted the family details from tens of thousands of pre-1800 prerogative wills before the fire. His notebooks and the family trees built from them survive.
- Solicitors' and estate copies: many families and law firms kept copies of wills; large collections have been deposited with the National Archives and PRONI in Belfast.
What About Church of Ireland Registers?
Roughly half of the Church of Ireland registers deposited in Dublin were destroyed, but "deposited" is the key word. Many rectors had refused to send their books, or had made copies first. Local custody registers, parish transcripts, and antiquarian copies mean a surprising number of "burned" parishes can still be researched. The Representative Church Body Library in Dublin maintains the master list of what survives for each parish.
What Is the Virtual Record Treasury of Ireland?
Launched on the centenary of the fire in 2022, the Virtual Record Treasury is an ongoing project to digitally reconstruct the destroyed Public Record Office by gathering transcripts, duplicates, and copies scattered in archives around the world. Millions of words of "lost" records have already been recovered this way, and new material is added regularly — well worth revisiting if you last searched years ago. And if you are starting from scratch on this side of the Atlantic, begin with our step-by-step guide to tracing Irish ancestry when the records were burned.
Frequently Asked Questions
What is the best substitute for the lost Irish censuses?
Griffith's Valuation is the standard substitute for the mid-1800s, naming nearly every head of household in Ireland. Pair it with the Tithe Applotment Books for the 1820s–1830s and pension search forms for details from the destroyed 1841 and 1851 returns.
Can I still find an Irish will from before 1922?
Often you can find its details. Probate calendars from 1858 survive complete, and Betham's abstracts preserve the genealogical content of thousands of earlier wills, even though the original documents burned.
Is the Virtual Record Treasury of Ireland free?
Yes. It is a free online research portal that reunites surviving copies and transcripts of records destroyed in 1922, and its collections continue to grow.
Did any original records survive inside the Four Courts?
A small amount of material survived in salvageable condition, and some record series were stored elsewhere entirely — which is why civil registration, the 1901 and 1911 censuses, and Catholic parish registers are intact today.
The fire took much, but a century of patient reconstruction has given a great deal back. When one of those recovered records finally hands you the surname of an ancestor, search that name in the bar at the top of this page — chances are we carry its family crest on something worth keeping.
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