Sri Aurobindo In Calcutta 1908-1909

…early one morning [in May 1908] while he was still sleeping, the police charged up the stairs, revolver in hand, and arrested him. He was taken to the police station and thence to Alipore Jail where he remained for a year….
In the jail he spent almost all his time in reading the Gita and Upanishads and in intensive meditation and the practice of Yoga.