Could you recount the story of Das Ganu and the manifestation of the Ganga and Yamuna from Baba's toe as told in Chapter 22?

Certainly. Chapter 22 of the Shri Sai Satcharitra narrates a beautiful leela concerning the devotee Das Ganu. When Das Ganu asked for permission to go bathe in the holy waters of Prayag, Baba instructed him that his own big toe was Prayag itself. Baba told him, "Know this big toe of Mine to be Prayag; bathe right here." As soon as Das Ganu accepted this with faith and placed his head on Baba's feet, the holy waters of both the Ganga and Yamuna rivers miraculously manifested from that very spot. This incredible event, described in Chapter 22, demonstrated Baba's 'Unfathomable power, inconceivable lila' and satisfied Das Ganu's spiritual desire without him needing to travel.