XThe BNC is the result of a collaboration, supported
by the Science mid Engineering Research Council (SERC
Grant No. GR/F99847) ,and the UK Dep,'u'tment of Trade
and Industry, between Oxford University Press (lead p~u'tner),
Longman Group Ltd., ChambersHarrap, Oxford
University Computer Services, the British Library and
Lancaster University. We thank Elizabeth Eyes, Nick
Smith, mid Andrew Wilson for their v,'duable help in the
preparation of this paper.