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How to Research History: Find Sources and Verify Claims

A reliable history search starts with a focused question and ends with evidence another person can check. Learn where to look, how to assess sources, and what to record.

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To find the history of a person, place, object, event, or claim, start with a specific question, identify the evidence that could answer it, and search the repositories most likely to hold that evidence. Then assess each source in context, compare it with independent records, and keep notes precise enough for someone else to retrace your work. No single search engine, archive, or source type can settle every historical question.

How do I find the history of a person, place, or object?

1. Turn curiosity into a question

Define the subject, place, time period, and point you want to establish. “What was this building used for in 1920?” is more useful than “What is this building’s history?” Write down what you already know and what evidence could answer the question. For a place or property, the National Park Service recommends setting research objectives, identifying relevant issues and previous work, and deciding what information, methods, and source types are needed. See the NPS Historical Documentation Guidelines.

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2. Gather clues you already have

Begin with records and objects close at hand: letters, photographs, certificates, diaries, inscriptions, family papers, or interviews with people who know the subject. For family history, the U.S. National Archives and Records Administration (NARA) recommends starting with known details and working toward unknown generations, while recording names, dates, places, and relationships. This is a U.S.-oriented starting point; records and routes differ by country. NARA’s genealogy guidance describes possible record paths including federal, state, county, church, library, society, and other archives.

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3. Choose repositories by the evidence you need

Ask who would have created or preserved the record you are seeking. A local government may hold property or planning records; a library, museum, university, community organization, or specialist archive may hold photographs, newspapers, manuscripts, or organizational records. Search the repository’s own catalogue and research guidance as well as the open web. A catalogue’s search tools and descriptions may work differently from a general search engine, and staff can sometimes help identify relevant collections.

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Some records are digitized; others require an in-person visit, a written request, or assistance from staff. The UK National Archives explains that using archives involves locating relevant records and understanding how to access them in its research guides. The Library of Congress recommends exploring curated sets and collection searches, and using available date and location facets. Its collections reflect choices shaped by collection strengths, copyright, and acquisition history, so material online is not a complete inventory of what exists. See Library of Congress guidance on finding primary sources.

How can I verify a historical claim?

Read the source for what it can establish

A primary source is evidence from the period being studied, such as an eyewitness account, photograph, letter, poster, or report. It can offer direct insight into that period, but it is not automatically complete, accurate, or unbiased. Later historical writing can help explain context, but it too should be evaluated rather than treated as proof by itself.

For each source, consider who created it, when and why it was made, who its audience was, what it says, and what it leaves out. A government report, personal letter, newspaper account, and commemorative plaque may describe the same event from different positions and for different purposes. The UK National Archives’ guidance on working with evidence and NARA’s primary-source analysis resources emphasize perspective and limitations.

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Compare independent evidence

Look for records created independently of one another, preferably from different contexts or for different purposes. Check whether they agree on the detail at issue, not merely whether they mention the same subject. A later account that repeats an earlier claim is not necessarily independent corroboration. If sources conflict, note the difference and investigate their dates, creators, purposes, and proximity to the event rather than choosing the most convenient version. NPS guidance recommends examining contradictions, source accuracy, and bias, and pursuing further evidence when accounts do not align.

There is no universal ranking that makes one source type best for every question. The most useful evidence depends on the claim, the creator, the record’s date and purpose, the collection context, geographic and chronological coverage, access conditions, and corroboration. If the evidence remains incomplete, state what is uncertain and why; do not turn an inference into an established fact.

What should I record so the research can be checked?

Keep a research log as you go. For each item, record enough detail to find it again and show which claim it supports. The National Park Service puts the purpose plainly: “Sources should be recorded so that other researchers can locate or verify the information discovered during the search.”

  • Repository and collection name
  • Creator and item title or identifier
  • Date and place associated with the item
  • Page, box, folder, or image number, where applicable
  • How and when you accessed it, including catalogue details or access constraints
  • The specific claim it supports, with your interpretation kept separate from the source’s own content

For an online image, preserve the collection and item details shown by the holding institution rather than relying only on a copied file or a search-result snippet. A clear record makes it easier to revisit a source, compare it with new evidence, and let another person verify your conclusion.

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U.S. family-history example: follow the jurisdiction and record type

For a U.S. ancestor, NARA’s genealogy guide points researchers toward several distinct record paths, including federal census, military, passenger-arrival, naturalization, tax, court, and land records, as well as state and county holdings, church records, and local libraries, societies, and archives. Which route is useful depends on the person, time, place, and question. A federal collection is not a substitute for local or religious records when those are the likely evidence.

NARA describes the U.S. federal census as having been taken every ten years since 1790. Its genealogy page, reviewed September 29, 2021, also states that censuses taken more than 72 years ago are available to the public online. That statement is specific to U.S. census records and to NARA’s guide; check NARA’s current access information before relying on online availability for a particular census or record. Neither the schedule nor access rule applies universally outside the United States.

A practical checklist for a defensible conclusion

  • Have I defined the exact person, place, object, event, or claim and the period in question?
  • Have I identified what evidence could answer it, rather than searching without a target?
  • Have I checked repositories suited to the record type and geography, including catalogues and finding aids?
  • Have I assessed each source’s creator, date, purpose, audience, perspective, and omissions?
  • Have I compared independent evidence and recorded any contradictions?
  • Can another person locate the sources and distinguish documented facts from my interpretation?

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