After travelling east on the banks of the Brahmputra, Guru Nanak Dev Ji and Bhai Mardana Ji stopped at a town called Golaghat. Here they met Kauda Rakhsas, who was a cannibal. He got a hold of Guru Ji and Bhai Mardana Ji, but after seeing them engrossed in Kirtan, Kauda let them go.
Bhai Vir Singh Ji writes, that Kauda would not eat everyone he captured. He had a mirror that he would point at his victims, and if the reflection showed an animal he would eat them. Guru Ji asks what Kauda saw when he pointed the mirror towards them. Kauda replied I saw only You, which means you are entirely true.
Bhai Bala Janamsakhi narrates that it was Bhai Bala Ji who was picked up by the cannibal, but when placed in the cauldron, the oil cooled. The name for the cannibal, Kauda, also comes from the Bhai Bala Janamsakhi.
Bhai Mani Singh Janamsakhi states the cannibals heard Guru Jis kirtan and became their disciples. It is also similar to the Vilayatawali Janamsakhi.
The Vilayatawali Janamsakhi writes that Guru Ji visited 'Dhansari' des, where demons ate humans. The town visited by Guru Nanak Dev Ji is called Golaghat.
Golaghat was in the Dhanasri Valley, named after the Dhanasri river. North of the valley were open plains surrounded by the Naga mountains.
The people that resided here were called 'Nagas'. They were cannibals and sacrificed humans.
'The custom which has attracted most attention, and which differentiates the Nagas from other Tibeto-Burman tribes, such as the Bodas, Mikirs, Daflas, and sub-Himalayan people, is their strange craving for human heads. Any head was valued, whether of man, woman, or child; and victims were usually murdered, not in fair fight, but by treachery.'
Imperial Gazetteer of India, Vol 18, p.291.