They also collected information about births, deaths and marriages in the families and recorded it in their scrolls.These scrolls containing information going back to several past centuries formed the valued part of the bards` hereditary possessions. A group of Bhatts was introduced to Guru Arjan, Nanak V, by Bhatt Bhikha who had himself become a Sikh in the time of Guru Amar Das. According to Bhai Gurdas, Varan, XI. 21, and Bhai Mani Singh, Sikhan di Bhagat Mala, he had once visited Guru Arjan with the sangat of Sultanpur Lodhi.
Some of the Bhatts who came into the Sikh fold composed hymns in honour of the Gurus which were entered in the Guru Granth Sahib by Guru Arjan. These Bhatts and their successors too maintained their vahis in which they recorded information concerning the Gurus, their families and some of the eminent Sikhs.These old vahis are still preserved in the descendant families, now scattered mostly in Haryana state. Their script is bhattakshari, a kind of family code like lande or mahajani.
During the late 1950`s, a researcher, Giani Garja Singh, obtained Gurmukhi transcripts of some of the entries pertaining to the Guru period, from Guru Hargobind (1595-1644) to Guru Gobind Singh (1666-1708) through Bhatt Man Singh of Karsindhu village, in Jind district. Some of these were published as footnotes to Shahid Bilas Bhai Mani Singh, edited by Giani Garja Singh and published by Punjabi Sahitya Akademi, Ludhiana, in 1961.The rest are still in manuscript form lying in the Department of Punjab Historical Studies, Punjabi University, Patiala.
These extracts provide valuable information regarding dates, places and events of the period. As contemporary evidence, BhattVahis have to be used with caution however, for they are not diaries of the eyewitnesses. It was customary for the Bhatts to visit their hereditary patrons usually twice a year at harvest time to sing their praises and receive rewards or customary donations as well as to collect information for record in their vahfs.These records are, therefore, based on information gathered generally after the occurrence of events and, possibly, sometimes received at second hand.
This may not apply to entries regarding the Gurus which were recorded by Bhatts who generally remained in attendance. For instance, an entry about the conferment of guruship upon the Guru Granth Sahib in 1708 is by Bhatt Narbud Singh (son of Keso Singh and grandson of Bhatt Kirat whose hymns are included in the Holy Book) who had accompanied Guru Gobind Singh to Nanded. On the whole, these Bhatt Vahis are a mine of information of historical and sociological value