What details does the preface provide about the biographies of Sai Baba written by Shri Dasganu Maharaj?

The preface, specifically in Chapter 0, describes Shri Dasganu Maharaj as a foremost modern poet who was worthy of Shri Sai Baba's grace. He authored two biographies of Baba. The first is found in his Bhaktalilamrut (Chapters 31, 32, 33), comprising 12 pages and 509 verses. The second is in his Bhaktisaramrut (Chapters 52, 53), which has 12 pages and 497 verses. Chapter 0 characterizes both works as 'excellent, heart-touching, and graceful' and suitable for study, but notes they are 'very short.' It also points out that the stories contained within them are mostly the same as those found in the Shri Sai Satcharita.