The Leningrad Codex, which dates to approximately the same time as the Aleppo codex, has been claimed to be a product of the Ben-Asher scriptorium. However, its own colophon says only that it was corrected from manuscripts written by Ben-Asher; there is no evidence that Ben-Asher himself ever saw it.
==Qumran Fragments==
The discovery of the Dead Sea Scrolls at Qumran, dating from c.150 BC–AD 75, show numerous small variations in orthography, both as against the later Masoretic text, and between each other. However, despite these variations, most of the Qumran fragments can be classified as being closer to the Masoretic text than to any other text group that has survived. According to Shiffman, 60% can be classed as being of proto-Masoretic type, and a further 20% Qumran style with bases in proto-Masoretic texts, compared to 5% proto-Samaritan type, 5% Septuagintal type, and 10% non-aligned.<ref>Shiffman, ''Reclaiming the Dead Sea Scrolls''</ref> Furthermore, according to Haas, most of the texts which vary from the Masoretic type, including four of the Septuagint type manuscript fragments, were found in Cave 4. "This is the cave where the texts were not preserved carefully in jars. It is conjectured, that cave 4 was a geniza for the depositing of texts that were damaged or had textual errors."<ref>Gretchen Haas</ref>
