attic · the key that should be there is missing
heavy. green-black, where the paint remains. it works, or it works minus one letter, depending on what you are trying to say. the missing key is one of the common ones.
the page in the platen is unfinished. it has been unfinished, in the same sentence, for years. you have not removed it.
field-note: the absent letter is replaced in the prose by a small careful hyphen, or by nothing.
word · letter · pen · lacuna · errata