Decide on a measurement protocol before you start: where heights begin, how depth is taken when tops overhang, and which units reflect period conventions. Record both metric and imperial for cross-checking. Describe woods with caution, noting primary, secondary, and possible later replacements. Consistency allows you to test whether a “4 ft. 2 in.” chest is truly the one mentioned, or a cousin close enough to tempt, but not to prove.
High-resolution photographs under raking light can reveal plane chatter, tool sweeps, and filled nail holes invisible to the eye. Look beneath drawers for chalk numerals that match cabinetmaker practices, or under tops for inked owner initials echoed in inventories. Ultraviolet can expose alterations, while endoscopic views verify mortise forms. Every subtle trace you document thoughtfully makes the leap from description to object shorter, surer, and more convincing to outside reviewers.
Documents and objects rarely align perfectly. Dimensions drift through shrinkage, hardware changes reflect repairs, and clerks compress descriptions. Develop thresholds for reasonable variance and keep a log of uncertainties. If evidence conflicts, say so plainly and seek independent support rather than stretching data. Intellectual honesty builds credibility with museums, insurers, and clients, and ironically, often opens doors to overlooked corroboration that emerges only when pressure eases.