Carole McCulloch, family history researcher and founder of the Essential Genealogy Academy, explains how AI tools can support every stage of a one-place study, from building a population register to publishing a living archive.
Introduction
Somewhere in your research, you may have already begun a one-place study without knowing it had a name.
The moment you follow one address through three census years, or start noting the neighbours on either side of your ancestor, or find yourself wondering what a street looked and felt like in the year your great-grandmother lived there, you have crossed a threshold. You are no longer just tracing a family. You are reconstructing a place.
One-place studies are one of genealogy's most powerful and underused methodologies. Unlike a one-name study, which follows a surname across geography and time, a one-place study anchors itself to a specific location and asks a different question: not who carried this name, but who was here, what they did, and how their lives connected. The result is not a family tree but something richer: a community, reconstructed from the records it left behind.
That shift in focus changes what you find. Neighbours become significant. Landlords, lodgers, shopkeepers, and servants enter the picture. Patterns emerge across decades that no single family line would surface on its own. And ancestors who seemed isolated in your tree suddenly have context: a street, a trade, a social world.
This article shows how AI tools can support every stage of a one-place study, from building the initial population register to cross-referencing historical sources and publishing a living archive. Throughout, we use a working example: a one-place study of South Molton Street, Hanover Square, in Victorian London, developed using census data, trade directories, poverty maps, and one remarkable family letter from 1891.
What is a one-place study?
A one-place study (OPS) is a systematic, sustained investigation of every person who lived, worked, worshipped, or died in a defined geographical location across one or more periods of time. The place itself is the anchor. Individual families come and go within it, but the study holds its ground and accumulates knowledge with every new record added.
It is worth distinguishing the method from two related approaches:
- A one-name study follows a surname wherever it appears, crossing counties and countries.
- A one-family study traces a single lineage through generations.
- A one-place study holds its position and asks who passed through, what they did there, and how their lives intersected.
The Society for One-Place Studies opens new window, founded in the United Kingdom, maintains a register of active studies and provides guidance and community for researchers at every stage. Registering a study gives it formal recognition and makes it discoverable by other researchers working with the same location or families.
The scope is entirely defined by the researcher. It might encompass a single street in Victorian London, a rural parish in Devon across three centuries, or a hamlet in Wales from the earliest surviving register to living memory. What matters is not the size of the place but the rigour of the investigation.
What are the steps to a one-place study?
A one-place study follows a recognisable sequence, even when it does not feel like one at the time. Most researchers begin instinctively, pulled forward by curiosity. Naming the steps gives shape to what you are already doing and helps identify where AI can make the most difference.
| Step | What happens |
|---|---|
| Define the place | Set clear geographic boundaries. A street, a court, a parish, a hamlet. Precision here saves confusion later. |
| Establish a time frame | Choose your period. A single census decade is a manageable starting point, for example. |
| Gather the documentary layers | Census returns, parish registers, trade directories, maps, newspapers, probate records. Each layer adds different knowledge. |
| Build the population | Identify everyone present. Track arrivals, departures, occupations, and household structures. |
| Identify the patterns | Who clustered by trade? Which households took in lodgers? Patterns are the study's real reward. |
| Contextualise | Layer in social history: poverty maps, sanitary records, vestry minutes, and local newspapers. |
| Publish and share | A one-place study is a living document. Platforms such as WeAre.xyz allow your work to grow and remain discoverable. |
The sequence is rarely linear. You will move between steps repeatedly as new records surface and new questions emerge. The South Molton Street OPS follows this structure exactly: the street defined the boundaries, the 1881 and 1891 census returns established the population, trade directories and Booth's poverty maps provided context, and a single family group connected the street's data to the living voices of the people who called it home.
How can AI help with one-place studies?
The six-step workflow introduced in the first article of this series (Gather, Transcribe, Extract, Interrogate, Summarise, and Transform) scales directly from a single letter to an entire street. Each stage below includes a working prompt you can adapt for your own research.
Gather
Before any AI tool can help you, you need something to bring to it. The 'Gather' stage is where you collect every available record layer for your chosen place and time frame, using genealogy platforms to surface what exists before you begin analysing what it means.
For a one-place study, that means census returns, trade directory pages, parish register entries, and any newspaper or probate material that references your street. A useful prompt to open the research conversation with Claude is:
I am beginning a one-place study of South Molton Street, Hanover Square, London, covering 1881 and 1891. I have gathered census returns for both years, Post Office London Directory entries, and Booth's poverty map references. What additional record types would you recommend for a Victorian London street study, and where are the most likely digitised sources for each?
This prompt does two things simultaneously: it tells Claude what you already have, so it does not suggest sources you have covered, and it asks for a targeted gap analysis rather than a generic list. The response becomes a research checklist you can work through systematically before moving to transcription.
Transcribe
Gemini is well-suited to census transcription because it produces downloadable CSV output, making data immediately sortable by address, occupation, or birthplace.
Try selecting segments of the census record by cropping the original image file into manageable pieces. This helps you to train Gemini with smaller uploaded data. Then Upload your census page image and try the following:
Transcribe this 1881 census return exactly as written. Present the output as a CSV table with columns for: Schedule Number, Address, Name, Relationship, Condition, Age, Sex, Occupation, and Birthplace. Flag any unclear words with [unclear].
Extract
Once transcribed, take each CSV output from Gemini to Claude, which extracts every named individual into a structured population register. A useful prompt is:
From the transcribed census data below, extract every named individual into a table: Name, Age, Address, Relationship to Head, Occupation, Birthplace, and Census Year. Note any individual appearing in both census years.
Interrogate
Treat this as a sustained dialogue with Claude rather than a single question. A strong opening interrogation prompt is the following:
Looking at this population register, what patterns can you identify in household composition, occupational clustering, and lodger arrangements? Present findings as labelled observations and clearly identify anything that is an inference rather than a fact.
In the South Molton Street study, this exact approach identified an upstairs/downstairs dynamic that no individual record had made visible. This is where the AI insights can reveal patterns that the human eye often misses when dealing with large data files.
Summarise
A one-place study draws on three source types that genealogists often treat separately:
- Booth's Life and Labour Maps, for social class
- Post Office London Directories, for commercial occupants by year
- The Gazette, for legal notices, bankruptcies, and probate announcements
Perplexity's live web search locates digitised versions of all three in a single session:
Search for references to South Molton Street, Hanover Square, in Booth's Life and Labour, Post Office London Directories 1880 to 1895, and The London Gazette for the same period. Summarise what each source reveals about the street's social and commercial character.
Transform
When the evidence is solid, Claude drafts contextual passages from a structured brief of verified facts, which you rewrite in your own voice:
Using only the verified facts listed below, write a short narrative passage about life at this address in 1891. Flag any contextual detail beyond the evidence as [contextual inference].
What are the benefits of a one-place study?
The most immediate benefit of a one-place study is context. A name, a date, and an address tell you that your ancestor existed. A one-place study tells you what it meant to exist in that particular place at that particular moment. The street is no longer just an address. It is a world.
The second benefit is the connections you did not know to look for. Neighbours witness marriages. Landlords appear as executors in wills. These are not coincidences; they are the texture of how communities actually function. You only see them when you study the place rather than just the family.
One-place studies are also unusually effective at breaking through brick walls. A missing baptism may be recovered through a neighbour who shared the same church. An unidentified relationship may resolve when you discover that two families lived three doors apart for 20 years.
Finally, a one-place study produces something you can publish and share in a form that grows over time. When you register with the Society for One-Place Studies and publish on a platform such as WeAre.xyz, your work becomes part of a living archive that other researchers can find and build upon long after you have moved on to the next question.
Summary
A one-place study is not a project you complete. It is a commitment you make to a place, and in making it, you change what you are able to find.
Start with what you already have. If there is an address in your tree that has drawn you back more than once, that is your starting point. Define your boundaries, build a rough population register, and bring it to Claude. Ask what patterns the evidence suggests, what is missing, and what the street would look like if your hypothesis were correct. Then go and find out.
Register your study with the Society for One-Place Studies at one-place.org.
The place has been waiting. The tools are ready. The only remaining question is which address you are going to commit to first.
About the author
Carole McCulloch opens new window is a veteran family history researcher and "edupreneur" with over 30 years of expertise in British genealogy. Since the 1990s, she has specialised in the social histories of the Allery and Cutting families, tracing their paths from Devon and Pembrokeshire to Surrey. Carole migrated to Australia in 1949 and now lives in Wodonga, Victoria.
In 2020, she founded the Essential Genealogy Academy opens new window, where she serves as a lead educator for a global community of family historians. With a portfolio of over 40 courses, she bridges the gap between traditional archival research and modern digital storytelling. Her current work focuses on the intersection of heritage and technology, specifically guiding researchers through Ancestry in the Age of AI to transform raw data into compelling ancestral narratives.
See also
How to use AI tools for family history research
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Society for One-Place Studies opens new window
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Publication date
26 May 2026
Any opinion expressed in this article is that of the author and the author alone, and does not necessarily represent that of The Gazette.