Demetrius Charles Boulger, England and Russia in Central Asia (1879)
“ Central Asia is that portion of Asia which intervenes between the English and Russian frontiers wherever they now are, or wherever they in the future may be. It is consequently a variable tract of country in accordance as those frontiers advance or recede. Khokand and the districts Amou Darya and Trans-Caspiania are by this definition no longer in Central Asia; but Bokhara, Khiva, the Turcoman country, and Afghanistan remain included in it, and these countries, with Persia and the Pamir Khanates, actually constitute the whole of what may be called Central Asia. ”
