Many thanks to LJ Cook for the reference.  I shall pass this information
on to the colleague with whom I was discussing mirrors (and their place
in the re-creation of a farm worker's cottage - it was a very wide-
ranging discussion), and put _Small Things_ onto my book wants list.

Best wishes to all
--
Pat Reynolds
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   "It might look a bit messy now, but just you come back in 500 years time"
   (T. Pratchett)