According to Chapter 2, what other texts or sources contained stories about Sai Baba before the Sai Satcharitra was written?

Chapter 2 mentions several pre-existing sources that documented Sai Baba's life and teachings. Das Ganu is credited with writing two books, 'Bhakta-Lilamrut' and 'Santa-Kathamrut'. Specifically, 'Bhakta-Lilamrut' describes the sweet life of Shri Sai in three chapters, and 'Santa-Kathamrut' contains a knowledge-story told by Sai in its 57th chapter. Other sources cited in Chapter 2 include Raghunath-Savitri’s 'Bhajanmala,' which contains abhangs and verses, miscellaneous poems by Das Ganu, works for Gujarati devotees by Amidas and Bhavani Metha, and a series of stories published in Pune under the name 'Sai Prabha.'