Can you tell me about the specific healing stories related to Sai Baba's Udi mentioned in the footnotes of the Satcharita?

Certainly. The footnotes in Chapter 33 of the Shri Sai Satcharita, as noted by R. Hari Sitaram Dixit, share several remarkable stories about the power of Udi. One account involves Khimji Lalji Joshi's daughter, who was gravely ill and so weak she couldn't walk. After her mother obtained Udi, she felt some initial relief. The family then took her to Shirdi, where Baba applied Udi to her, and within a few days, she began to walk again. Another story tells of a friend who couldn't sleep for eight days and found immediate relief after taking Udi for just one night. Similarly, a friend's child from Bandra who hadn't slept in two months was able to sleep soundly after his father took him for Baba's Darshan in Shirdi.