One division of the Nats are Muhammadans and seem to be to some
extent a distinctive group. They have seven _gotras_--Chicharia,
Damaria, Dhalbalki, Purbia, Dhondabalki, Karimki and Kalasia. They
worship two Birs or spirits, Halaila Bir and Sheikh Saddu, to whom
they sacrifice fowls in the months of Bhadon (August) and Baisakh
(April). Hindus of any caste are freely admitted into their community,
and they can marry Hindu girls.