Thanks JennyS.
I've actually bought Dobson, but most of the time I am finding it difficult to pin things down from his photos. If I think I've got a reasonable idea, I try to cross reference with photo's on the web. (Including your own site - very useful
).
I appreciate though, that a lot of these things might need chemical testing and microscopy etc., and realise there will be many occasions where just using photos, I won't get near to certainty on ID's.
But hopefully, the more photo's I see, (and the more live specimens), at least some of the relevant things might start to fall into place.
Regards
Mike.