There is a photograph taken in 1937 of Stalin walking along the Moscow-Volga canal with three officials. One of them is Nikolai Yezhov, the head of the NKVD, in uniform, at Stalin's left shoulder.
There is another version of the same photograph in which Yezhov is not there. The water and the railing continue behind where he stood, retouched by hand.
Yezhov was arrested in 1939 and executed in 1940. The photograph was corrected afterwards.
David King spent decades collecting these, comparing print runs of the same books and periodicals, and published the results as The Commissar Vanishes. The scale is the striking part. It was not a handful of images; it was systematic and continuous, carried out by retouchers with airbrushes and scalpels, applied to photographs, paintings, encyclopedias and textbooks. Libraries received instructions to excise pages and paste replacements. Owners of the Great Soviet Encyclopedia were sent a replacement article on the Bering Strait to be glued over the entry for Lavrentiy Beria.
The technique attacks memory at its weakest point, which chapter 65 has already established.
Recall is reconstructive. Elizabeth Loftus's misinformation studies show that post-event information — including images — is integrated into the memory of the event, and that people cannot afterwards distinguish which elements came from the original experience and which were supplied later. Confidence does not track accuracy, and in some conditions rises with the false detail.
So an altered photograph is not merely a false public record. It is an input to private recollection, and within a decade or so a person who was in the room may recall the room as the photograph shows it.
Where private memory does persist and conflicts with the official image, the conflict produces dissonance that most people resolve in favor of the artifact — because the artifact is shared, checkable against other people, and dangerous to contradict, while the memory is private and unsupported.
That is the mechanism behind Orwell's unperson. The state does not need to forbid remembering, which would be unenforceable. It needs to remove the external anchors that make a memory checkable, and then time does the work.
The general principle, and the reason this chapter is in a guide rather than a history: an unanchored memory degrades toward the available record. The countermeasure is to hold the record independently, which in this period meant hiding a photograph and risking your life for it. A surprising number of people did, which is why the comparisons in King's book exist at all.
Aftermath & Cross-Reference: Documentary Verification Protocol