I'm looking for the part where Baba instructs a devotee from America on how to read the Jnaneshwari. Can you explain the specific instructions he gave?

The source text from Chapter 18 makes no mention of any devotees from America or specific instructions given to them. The focus is entirely on the community of devotees in Shirdi. The chapter details how Sai Baba orchestrated the daily reading of sacred texts like the Nath Bhagawat and Jnaneshwari. Chapter 18 explains that Baba would assign these readings, such as the one given to Sakharam Hari Jog in Sathe's Wada, for the spiritual welfare of all devotees. His method involved sending devotees to listen to the readings, where they would often find that the text being read confirmed a story Baba had just told them.