How did Sai Baba create the Udi, and what was the protocol for a devotee to receive it when leaving Shirdi?

Chapter 33 details the process of how Sai Baba's Udi was created and distributed. Baba would purchase bundles of firewood and offer these dry logs into the sacred Dhuni, a fire he kept constantly burning in front of him in the Masjid. The ash that remained from this continuous fire was the Udi. For devotees wishing to return to their villages, a specific protocol existed. When they asked for Baba's permission to leave, the act of him giving them the Udi was considered the true sign of his consent. As the chapter mentions, 'when saying "Take the Udi," true permission was granted then,' which would fill the departing devotee with enthusiasm.