Masands?

Are they any books which give an early account on the masands appointed by Sri Guru Ji ?

Also, did any masands write any books themselves? Would Gursikhs such as Bhai Gurdas . Bhai Ram Kaur etc be considered as a masand. Also why wasnt BHai Gurdas Ji part of the Manji System since he went out and did parchaar on Gurmat.

may help Sukhdeep Singh jee:

[archive.org]

thanks for the link veer ji I will be sure to check it out.