Bhai Kulwant Singh was asked by a Bibi on why Dasam Granth isn’t ready often.
Following is in brief about Historical books mentioning Dasam Guru’s Compositions –
Rehitnama Bhai Nand Lal mentioned Jaap Sahib is an important Bani for a Sikh.
RehitNama Chaupa Singh Chibber quotes various lines from Bachitar Natak, 33 Swiayey, Chopai Sahib, Jaap Sahib.
In 1711, Sri Gur Sobha was written by Poet Senapat mentioned Conversation of Guru Gobind Singh and Akal Purakh, and written three of it’s Adhyay on base of Bachitar Natak.Sri Gur Sobha
In 1741, Parchian Srvadas Kian quoted lines from Rama Avtar, 33 Swaiyey and mentioned Zafarnama with Hikayats.Parchian Sevadas Kian
in 1751, Gurbilas Patshahi 10 – Koyar Singh Kalal, mentioned Guru Gobind Singh composed Bachitar Natak, Krisna Avtar, Bisan Avtar, Akal Ustat, Jaap Sahib, Zafarnama, Hikayats etc. This is first Granth mentioned Guruship of Guru Granth Shahib.
In 1766, Kesar Singh Chibber mentioned history of Compilation of Dasam Granth by Bhai Mani Singh Khalsa on directions of Mata Sundri, as he was first who wrote history after death of Guru Gobind Singh.
In 1766, Sri Guru Mahima Parkash – Sarup Chand Bhalla, mentioned about various Banis of Guru Gobind Singh and Compilation of Dasam Granth
In 1790, Guru Kian Sakhian – Svarup Singh Kashish, mentione Guru Gobind Singh Composed, bachitar Natak, Krishna Avtar, Shastarnaam Mala, 33 Swaiyey etc.Guru Kian Sakhian
In 1797, Gurbilas Patshahi 10 – Sukkha Singh, mentioned compositions of Guru Gobind Singh.
In 1812, JB Malcolm, in Sektch of Sikhs mentioned about Dasam Granth as Bani of Guru Gobind Singh.
Kamalroop Singh in his recent PHD has discovered many new sources related to the history of the Sri dasam Granth Sahib. Gurinder Singh Mann has cataloged many British sources on the Sri Dasam Granth and how the Granth was marginalised by the British.