My Greatest Ever Find turned up more ROMs and spare ICs than I have ever seen before. Here are EPROMs of Inter-Word, Wordwise, Master ROM, Pascal, Logo, Comal, DFS, NFS, Spell Master, Spellchecker III, and so on. There are a couple of Acorn ROMs which I have not yet identified.

In addition there are lots of salvaged ICs from the BBC. There are quite a few 6522s, a 6502, 7002 and loads of little 74 series ICs.

I tried out all the EPROMs on my Master. Most of them worked fine but there were a few which did not do anything which I will have to try out on a Model B.