Sukhidaan - Historical Sources

[Balkaar]

Waheguru Ji Ka Khalsa, Waheguru Ji Ki Fateh,

I'm looking into the historical usage of sukha by Sikhs, but I'm not sure where to begin. If anyone could help me out and point me in the direction of historical accounts (sikh, british, persian, anything really) or puraatan granths I'd very much appreciate it. 

Just a note, I'm not looking to begin a debate on the rights or wrongs of sukha maryada, my main concern is subjective historical study. I understand some people may not agree with this maryada but benti, please don't turn this thread into another clash of the titans and get it closed down. 

WJKK WJKF

[Guest Jacfsing2]

What's Sukha?

[Guest]

Start from panth parkash, or rehitnama of bhai desa singh, suraj parkash, prem sumarag etc

[Koi]

Some of history is oral. In this case, look at nihang bole, sukha/nugda de salok etc. 

But as above, panth prakash is a very good source.