1911 Encyclopedia Britannica
A town of British India, 4120 ft. above sealevel, 63 m. from Rawalpindi, the headquarters of the Hazara district in the N.W. Frontier Province, called after its founder, Sir James Abbott, who settled this wild district after the annexation of the Punjab. It is an important military cantonment and sanatorium, being the headquarters of a brigade in the second division of the northern army corps. In 1901 the population of the town and cantonment was 7764.
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Chisholm, Hugh, General Editor. Entry for 'Abbottabad'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/a/abbottabad.html. 1910.