Can anyone please assist with an ID on this? It's a large, flat-ish thing, broken into a number of chunks. Two of the bits go together, but the rest doesn't seem to, though I strongly suspect that they were found together (they were sent to me together in a box with a load of random bone fragments). It's large, and very crumbly. It's about ready to fall to bits, so I plan on stabilising it as soon as possible. The inner texture is very distinctive.   I've been trying to think of things