Can you explain the author's personal story about Pir Maulana as described in Chapter 21?

Certainly. In Chapter 21, the author recounts an experience from when he was a Magistrate in Bandra. A famous Siddha named Pir Maulana resided there, and his servant, Inus, repeatedly urged the author to come for his vision. However, the author explains that due to pride and thinking, "Why should I go? Should I be pressured by others and lose my own prestige?", he never went. He reflects that this was a period of ill-luck, which prevented him from taking the opportunity. He uses this personal anecdote to illustrate the principle that one's own misfortune can be a barrier to receiving the grace of a Saint, even when they are physically close.