Page from a Guru Granth Sahib manuscript dated to 1705 giving dates of ascension (death) of Sikh gurus from Guru Nanak to Guru Tegh Bahadur

Page from a Guru Granth Sahib manuscript dated to 1705 giving dates of ascension (death) of Sikh gurus from Guru Nanak to Guru Tegh Bahadur. The practice was started with the sole objective of discrediting the rival pontiffs, such as the Minas, and to clear the line successors and authenticate the compositions of the Sikh gurus. The old codex has been dated to Har Sudi 2, 1762 Bikrami Samvat (June 12, 1705 A.D. in the Gregorian calendar). In the codex the date of death of Baba Gurditta and Guru Hargobind was written personally by Guru Hari Rai. Original manuscript is located in the private library of Prof. Anurag Singh.