Leave room for a gap in an object’s history
An object's history can contain a gap without becoming an invitation to invent a connecting story.
An object's history can contain a gap without becoming an invitation to invent a connecting story. State where the evidence ends and where it resumes.
Arrange the known records in date order. Identify the source of each claim: receipt, inscription, catalogue, photograph or a person's account. Keep uncertain attributions and reported dates qualified. Two records referring to similar objects may not describe the same physical thing.
Give the gap a shape
Instead of “history unknown,” write what is missing: ownership between two dates, the place of manufacture or the route into a family collection. A defined question makes future research more focused. Preserve spellings and reference numbers that may help locate further evidence.
Do not use appearance alone to bridge the gap. Style can suggest a line of enquiry, but it does not prove who owned an object or how it changed hands. Matters involving disputed ownership or regulated material need suitable expert advice.
When presenting the object, keep the uncertainty visible in ordinary language. A reader can still appreciate its form and the records that survive. An honest gap is useful information: it tells the next researcher what to look for and prevents an attractive possibility from hardening into a fact through repeated retelling.