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On Central Asian Tracks 72 -
Ruin of ancient watch-tower, T.ivc, on western flank of Tun-huang Limes, with
view to north - On left an eroded clay errace with deep-cut Nullah, Across
depression with Toghraks and tamarisks is seen in distance an isolated clay
terrace (A), bearing remains of ruined watch-tower, T iva. Stein recognized
that these detached towers west and south-west of the end of the Han wall were
placed as warning posts to cover the gap between the Su-lo Ho basin and the
high sand dunes to the south-west. They are found on the special maps.
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