Describe the chain of communication that led Dev to realize Baba had indeed attended his feast.

The realization occurred through a three-part communication process. First, a disappointed Dev, feeling that Baba had broken his promise, wrote a letter to a man named Jog, detailing his feelings of being deceived. Second, as described in Chapter 40, Jog took this letter to Sai Baba and read the account at his feet. Baba, in turn, revealed the truth: he had attended as a Sanyasi with two others, just as promised. Finally, Jog, filled with joy, wrote a detailed letter back to Dev, explaining everything Baba had said. It was upon reading this letter that Dev's eyes 'overflowed with a surge of love' and he understood his error.