Madam, - In his interesting article on sleeping and dreaming (Science Today, February 15th), Prof Wiliam Reville misquoted Coleridge's poem Kubla Khan. The caverns through which ran Alph, the sacred river, ran were not "meaningless to man" but "measureless to man", a quite different state of affairs. - Yours, etc,
BRENDAN GLACKEN,
The Gasworks,
Barrow Street,
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Dublin 4.