For clerks, recorders, archivists, records managers and the volunteers who look after the paper trail of daily life.
Deeds, plats, birth and marriage registers, council minutes: the records that prove who owns what and who was born where are still, in most towns, bound volumes on a shelf. Heat, damp, handling, old tape and acidic paper wear them down a little every year. The Ledger is written by people who have worked those shelves (clerks, a conservator, a digitization lead, a records consultant and a local archivist), and it explains, plainly, how to keep the originals readable and the copies trustworthy.
It depends on what it is written on, and on how it is kept. Rough orders of magnitude, assuming good storage:
Centuries
for well-made rag or permanent paper kept cool, dry and dark. Acidic wood-pulp paper needs help much sooner.
LE-500
the life-expectancy rating of polyester silver-gelatin microfilm stored to extended-term conditions.
5-10 yrs
a sensible refresh cycle for digital storage media. Files outlive their disks only when someone migrates them.
Sexton's books, lot maps, interment registers and church burial records: what cemetery paperwork holds for local historians and how to survey and keep it.
How to find a grave in a cemetery: pin down the cemetery, ask for sexton records, interment registers and plot maps, then read worn stones without chalk.
How to choose a book scanner for bound books and record volumes: overhead scanners with page flattening, when a flatbed is fine, camera setups, light and resolution.
How to digitize VHS tapes at home: check tapes for mold and damage, pick a VCR and a VHS to digital converter, set capture options, save MP4 and master files.
How to choose a document scanner for home and office records: duplex feeders, portable and receipt scanners, OCR, PDF/A and the specs that change daily use.
How to search newspaper archives online and on microfilm: free sources, paid databases, library access, OCR errors and search habits that find old local news.
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