There is dispute over the authenticity of the passage between John 7:53 and 8:11, known as the "Pericope adulterae" or "Pericope de Adultera". It appears in the King James Version but modern English translations note that it is not present in the most reliable early manuscripts of John, and therefore suggest that it is unlikely to have been part of the original text. Until recently, it was not thought that any Greek Church Father had taken note of the passage before the 12th century; but in 1941 a large collection of the writings of Didymus the Blind (ca. 313–398) was discovered in Egypt, including a reference to the "pericope adulterae" as being found in "several copies", and it is now considered established that this passage was present in its usual place in some Greek manuscripts known in Alexandria and elsewhere from the 4th century onwards. In support of this it is noted that the 4th-century Codex Vaticanus, which was written in Egypt, marks the end of John chapter 7 with an umlaut, indicating that an alternative reading was known at this point.