Henry Yule,
Hobson-Jobson — S
(1903)
“ The earlier Mahommedans hardly regarded Sind as part of India, but distinguished sharply between Sind and Hind, and denoted the whole region that we call India by the copula 'Hind and Sind.' We know that originally these were in fact but diverging forms of one word; the aspirant and sibilant tending in several parts of India (including the extreme east—compare ASSAM, Ahom—and the extreme west) , as in some other regions, to exchange places. ”
