I've copied this section from a big web site

http://www.lrb.co.uk/v21/n16/print/will02_.html

"The hydrotherapy in Malvern cured both Florence Nightingale and, in part, Tennyson, 'who came after a nervous breakdown, and declared he was "half-cured, half-destroyed" by the place'. Charles Darwin 'arrived depressed and unable to write, but was so persuaded by the effects of his treatment that he returned three more times'. (Darwin was to have his own douche-bath fed with Malvern water installed at home.) "