What are the key events and themes discussed in Chapter 42 of the Sai Satcharitra?

Chapter 42 of the Sai Satcharitra begins by praising Sai Baba as the Sadguru who helps devotees navigate worldly existence, referring to him as a 'Wish-fulfilling Tree'. The chapter recaps a story from the previous one about Sai's portrait being miraculously saved from water. The primary focus of this chapter, as stated within its text, is to describe Sai's nature and to provide a detailed account of him leaving his mortal body. As mentioned in Chapter 42, this significant event occurred on Vijayadashami in the Shaka year 1840, and the chapter sets the stage by emphasizing the blessedness of the people of Shirdi who experienced his presence.