Where is this metrical mnemonic key first described in Sanskrit literature? All the best, Dominik -- Dominik Wujastyk Wellcome Institute for the History of Medicine email: d.wujastyk at ucl.ac.uk 183 Euston Road, London NW1 2BE, England <URL: http://www.ucl.ac.uk/~ucgadkw/> FAX: 44 171 611 8545