Can you describe Sai Baba's unusual sleeping arrangements as mentioned in the text?

According to Chapter 10, Sai Baba's lifestyle was unique, particularly His sleeping habits. He would sleep on a very narrow wooden plank, described as being only one span (about 9 inches) wide and four cubits long. This plank was suspended from the rafters like a swing, tied at both ends with old rags. Remarkably, lamps would burn at His head and feet while He rested on this precarious bed. The chapter highlights that His movements were imperceptible, as no one ever saw when He got onto or off the plank.