On a side note, i want to add that i was in Ludhiana two weeks back to attend bhog ceremony of Bhai sahib's grandson, Bhai Manjit singh ji.It was great to see many singhs of Bhai sahib's time performing mesmerizing kirtan there.
Bhai Trilochan SIngh Ji who was the author of Bhai Sahibs autobiography mentions Bhai Sahib read many Dasam Granth Banis daily which included banis such as Bachitar Natak, Chandi Di Vaar, Akal Ustat, etc.
Bhai Trilochan SIngh Ji who was a close associate of Bhai Sahib has wrote extensively on Sri Dasam Granth. His English works on Sri Dasam Granth can be found here.