I know a bit about the Nag Hammadi, but I have not studied any of this in depth. Are the scrolls a part of the 1945 discovery of these texts? These also were found in clay jars. But I thought this was rather common in this area. In fact, I remember reading that the mother of the man that made the discovery of the Nag Hammadi, initally used the scrolls as kindling! (Makes you wonder what else has been devalued and lost!) What makes them different than the Dead Sea Scrolls? Gnostisim?
Gnosticism, right on.
They have nothing to do with the Dead Sea Scrolls, although they were found around the same time. Nag Hammadi is a village in Upper Egypt.
The Nag Hammadi library is a collection of gnostic writings from the third and fourth centuries AD. They basically contain our first glimpse at gnosticism on its own terms (that is, apart from the testimony of the church fathers). It even contains some of the writings of one of the earliest gnostic heretics, Valentius. The
Gospel of Thomas was also among them.
That said, they haven't really told us much. The library has given us a slightly more nuanced picture of gnosticism than we'd have from the church fathers alone, but it's not materially different from what we'd suspected for centuries. They're interesting academically, but they don't tell us anything new about Jesus or his world (unlike the DDS).
Christopher Tuckett, in an exhaustive study, has even gone through each of the texts to show that they are literarily dependent on the written gospels and even later gospel harmonies (like that of Tatian). They clearly do not evidence independent sources of Jesus-material. His only reservation was the
Gospel of Thomas, and hence all the Jesus Seminar fuss about it.
Thomas is a very early text (most date it around the beginning of the second century) and doesn't really contain any grammar or speech patterns from the canonical gospels. Thus, some have supposed that it gives as a new historical eye to see independent oral traditions about Jesus. John Dominic Crossan, a radical historical Jesus scholar, has based his career off this hypothesis.
Unfortunately, it's a bad hypothesis. Though the grammar and style of the canonical gospels aren't present,
Thomas contains Jesus-sayings spread across Mark, Q Source, Special M and redaction M, Special L and redaction L, John, and a variety of other sources detected within the canonical gospels. In order to believe that
Thomas was an independent and reliable source, we would have to believe A. that
Thomas had access to such a wide range of oral traditions that it practically encompasses every hypothesized early Christian community, and B. that not a single one of the canonical gospel sources takes a leading position of authenticity over the others, but that authentic and inauthentic material is spread quite evenly across all strains of the canonical tradition. This is simply too much of a jump for any honest historian to make.
Anyway, that's the Nag Hammadi library.