Which two people does Chapter 6 identify as being capable of performing the Ram Navami Kirtan in Shirdi?

Chapter 6 identifies two individuals who were prepared to perform the Ram Navami Kirtan in Shirdi. The primary person brought for this service was Balabuva Satarkar, a Haridas famous for his Bhajans and known as the 'Modern Tukaram.' However, the text also specifies a contingency plan. It states that if Balabuva Satarkar had not been available to perform, another devotee, Kaka Mahajani, would have stood for the Kirtan himself. This was possible because Kaka Mahajani knew the Ram Navami composition written by Dasganu by heart.