Can you describe the wooden plank that Sai Baba slept on as detailed in Chapter 10? What was so unusual about it?

Chapter 10 gives specific details about the unusual plank where Sai Baba slept. It was a wooden plank measuring four cubits in length but only one span, or approximately nine inches, in width. What made it particularly extraordinary was that it was not a stationary bed but was hung from the rafters like a swing, tied at both ends with simple rags. As described in the chapter, Baba would lie asleep on this narrow, suspended plank with lamps burning at his head and feet. The text questions how such a flimsy setup could possibly support his weight, concluding it was a demonstration of his divine Siddhis.