The Cambridge History of India, Vol. IV: The Mughul Period v4.c14.34

v4.c14.34

Sher Shāh despatched a force to besiege Gwalior, sent another to Sambhal, to secure and pacify the country to the east of the Ganges, and pursued Humāyūn first to Āgra and thence, as he continued his flight, to Lahore. From Lahore Kāmrān Mīrzā retired to Kābul, and Humāyūn into Sind, and Sher Shāh, having pursued him for some distance, returned to Lahore. He had now driven his foes from Bengal, Bihār, Hindūstān and the Punjab, had received the submission of the Baloch chiefs on the frontier, and was at leisure to turn his attention to domestic affairs. To guard his northern frontier he selected the site of a great fortress in the hills ten miles north of Jhelum, which he named Rohtās, after his stronghold in the hills of Bihār.