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INDIA

extending from the eastern limits of the Tibetan plateau
southwards into Burma. There is no true basis, either
geographical or geological, for the analagous statement
that the Himalayan system reaches east of the Brahmaputra.

To the south of the main chain several minor chains,
or folds, preserving an approximate parallelism to it, are
recognisable (especially in the north-western regions of
the Himalayas), with intervals filled in by irregular spurs
and subsidiary ridges. North of it we find (according

180VE 18000 F
BOOC- 72000 ~ |

1G. 24.—The Tibetan Platean.

to some authorities)1 a secondary wall of mountains,
flanked by the long trough of the upper Indus and
Brahmaputra (here called the Tsan-pu) which receive
the drainage of the northern Himalayan slopes. There
is certainly not sufficient geographical evidence at present
to maintain the theory of a secondary continuous wall
or chain in this position; and we must for the present
remain satisfied with the known fact that the main central
axis of upheaval, forming the true watershed of India,
crosses the plateau of Tibet from west to east to the
south of the central lake region. Within the limits of the
1 See ‘* Hunter’s Gazetteer,” vol, vi., ** India.”