What was Dev's reaction after his Udyapan ceremony was finished, and what did he write in his letter to Jog?

After the Udyapan was finished, Dev was left feeling disappointed and confused because he believed Sai Baba had failed to keep his promise to attend. As Chapter 40 recounts, he wrote a letter to his friend Jog to express his bewilderment. In the letter, Dev questioned how Baba could have "deceived" him and failed to show up after he had been invited with such love. He lamented that he did not have the "experience" he was waiting for and that everything had turned out contrary to his expectations, highlighting his complete inability to recognize that Baba had already visited him in the form of the Sanyasi.