To arrange a fonds into series, group the records by the functions, activities or record forms that produced them, respecting the creator's original order wherever it survives. Identify the major activities of the creating body, map the records onto those activities, and let each coherent grouping become a series. Document every grouping decision so the arrangement is reproducible and defensible — arrangement is an interpretive act, and the finding aid is your audit trail.

What counts as a series, and how do I spot one?

A series is records bound together by a shared origin: same function (e.g. "minutes"), same form (e.g. "photographs"), or same filing unit as the creator kept them. The clearest signal is the creator's own system — labelled drawers, a numbering scheme, a registry. When that exists, your series often announce themselves.

Look for these recurring series types:

• Governance: minutes, agendas, constitutions
• Correspondence (often by inward/outward or by correspondent)
• Financial: ledgers, accounts, audit papers
• Operational/project files
• Publications and publicity
• Photographs, plans, and other special formats

How do I respect original order without preserving chaos?

The principle of respect des fonds has two limbs: keep records of one creator together (provenance), and keep the creator's internal order (original order). Original order is honoured because it carries evidence — how the creator actually worked.

But "original order" means the creator's meaningful system, not the random state a collection arrives in after decades in a damp garage. The decision rule:

if creator's filing system is intact and legible:
    preserve it as the series structure
elif partial order survives:
    reconstruct it, note the reconstruction
else:
    impose a function-based arrangement, document it as archivist-imposed

When you impose order, say so explicitly in the processing note. Never disguise an imposed arrangement as the creator's.

What does a defensible series-arrangement workflow look like?

1. Establish provenance and function. Write (or read) the administrative/biographical history first — it predicts the series.
2. Survey the whole fonds before moving anything. Sketch the existing physical order.
3. Draft a series scheme on paper, mapping functions to candidate series.
4. Test the scheme against a sample of files; adjust before committing.
5. Assign series numbers (a stable, sortable scheme such as GB-0001-THORN/1, /2).
6. Record the decision for any item whose placement was ambiguous.
7. Capture physical vs intellectual order separately if you are not reboxing.

Should physical order match intellectual order?

Often not, and that is fine. Intellectual arrangement lives in the finding aid; physical location can stay as received to avoid handling fragile material. Modern systems (AtoM, CALM) store a logical hierarchy independent of shelf location, so you can present a clean series structure while boxes stay put. This is also faster and aligns with minimal-processing approaches.

How do I keep arrangement consistent across a big collection?

Consistency is where large fonds succeed or fail. Use:

Control	Purpose
A written series scheme	Single source of truth for what each series contains
A stable numbering convention	Prevents renumbering churn and broken citations
A decisions log	Records why ambiguous items went where they did
A title-formulation rule	Keeps series titles parallel and predictable
A second-reviewer pass	Catches drift before it propagates

Cite the series scheme in your processing documentation so a successor can extend it without guessing your intent.

Key Takeaways

• Build series around the creator's functions, activities and record forms.
• Respect original order where it is intact and meaningful; reconstruct or impose only when it is lost, and say so.
• Separate intellectual arrangement (finding aid) from physical order (shelf) when reboxing is not warranted.
• Use a stable, sortable numbering scheme to protect citations.
• Keep a decisions log for ambiguous placements — arrangement is interpretive and must be auditable.
• Enforce parallel series titles and a written scheme to stay consistent across the whole fonds.

Frequently Asked Questions

What is a series in archival arrangement?

A series is a group of records arranged together because they result from the same activity, have the same form, or were filed as a unit by the creator. It sits between the fonds and the file in the standard hierarchy.

Should I arrange by original order or by subject?

Respect original order (respect des fonds) wherever it survives and is meaningful. Re-arrange by subject only when original order is lost or was never coherent, and document that you did so.

How many series should a fonds have?

There is no fixed number. Let the creator's functions dictate it; a small personal collection may have three or four series, a corporate body dozens. Avoid splitting so finely that series become meaningless.

Can a record belong to two series?

Physically a unit lives in one place, so it belongs to one series. If it relates to another, use a cross-reference or an access point rather than duplicating or splitting the physical item.

Do I need to physically reorder boxes to create series?

Not always. Intellectual arrangement can be expressed in the finding aid while physical order stays as received. Many institutions separate intellectual series from physical box location deliberately.

What if the creator left no discernible order at all?

Impose a logical arrangement based on the creator's known functions or document forms, state clearly in the processing notes that the order is archivist-imposed, and keep it simple and consistent.

Related reading

• How to Apply levels of description
• When to Choose series vs item-level description
• Troubleshooting: Apply More Product Less Process
• Write a scope and content note: A Practical Guide