The most conspicuous range
in Eastern Afghanistan is another Safed Koh, not
to be confounded with the range above mentioned
of the same name. This chain, reaching in its
highest summit, Sikaram, a height of 15,620 feet,
divides the valley of Jalalabad from the Kurram River
and Afridi Tirah; and among its northern and
eastern spurs are those formidable passes,
between Kabul and Jalalabad, which witnessed the
disasters of 1841-2, and the famous Khyber Pass
between Jalalabad and Peshawar. An offshoot
southwards terminates in a plateau consisting of
the Psein Dag and Toba. This chain practically
divides Afghanistan from the Indus valley.
Imperial gazetteer of India:
provincial series, Volume 1 Supt. of Govt.
Print., 1908