What specific details does the preface provide about Dasganu Maharaj's biographical writings on Shri Sai Baba?

The preface identifies Dasganu Maharaj as a foremost modern poet who was graced by Shri Sai Baba. It specifies that he wrote two biographies of Baba. As detailed in Chapter 0, the first is in his "Bhaktalilamrut" (Chapters 31, 32, 33), consisting of 509 verses, and the second is in "Bhaktisaramrut" (Chapters 52, 53), with 497 verses. Both are described as being excellent and graceful but are noted to be very short, each spanning about 12 pages. The stories within them are said to be mostly the same as those in the "Shri Sai Satcharita."