BULAKI DAS was the masand or head of the Sikh sangat, at Dhaka, now capital of Bangladesh, during the third quarter of the seventeenth century. Dhaka had been visited by Guru Nanak at the beginning of the sixteenth century when a sangat had emerged in the town. During the time of Guru Hargobind, a Sikh, Bhai Mohan, had kept the Guru`s message alive there. Bhai Nattha, third in succession to Almast, the Udasi saint, who had been sent by Guru Hargobind to preach in the eastern parts, had been deputed to supervise the sangats or Sikh fellowships or communities in Bengal.
DIAL DAS, BHAI or Bhai Diala (d. 1675), martyr to the Sikh faith, was, according to Shahid Bilas Bhai Mani Singh, the son of Mai Das and an elder brother of Bhai Mani Ram. He was a prominent Sikh of his time and was in the train of Guru Tegh Bahadur during his journey across the eastern parts in 1665-70. He was one of the Sikhs detained and later released by the Mughal rulers in 1665. As the Guru proceeded further east from Patna, Dial Das was left behind to look after the Guru`s family.