History of Aurangzib, Based on Original Sources v2.c23.52

v2.c23.52

A regular investment would have caused a long delay, detained the army there, and given Dara time to gather strength at Delhi. So, Aurangzib took counsel with his generals, and after a long discussion they hit upon a clever device, which reduced "this extremely strong fort in only three days." Thirst opened the gates of Agra more speedily than assault or bombardment.