Roshanara Begam was a pupil of Ustad Abdul Karim Khan sahab and her details can be found at http://www.musicalnirvana.com/hindustan ... begum.html
Unfortunately she migrated to Pakistan and she didn't get the recognition due to her in India. A loss for India more than her. It is surprisingly hard to get hold of her music. I have a fair bit of her music including vilambit pieces of Shankara, Kedar, Bhimpalasi, Kalavati, Kamod, Marwa and Mian Ki Malhar and a few others.
What I do not have and know does exist out there due to short clips on the net are Nand, Multani and Malkauns. If any gentleman or gentler lady would like to either get the music I mentioned or something else please do not hesitate to reply.
On the flip and much more important side if you have something by her please please do let me know.