After hosting the meal for the Sanyasi and his companions, why did Dev feel disappointed and write a letter to Jog?

Dev felt disappointed after the meal because he suspected he had missed a significant spiritual event. As explained in Chapter 40, Dev had previously invited Baba to his Udyapan ceremony, and Baba had promised to come. Although three uninvited guests appeared and were served, Dev's mind was clouded by a "veil of Maya," and he failed to recognize them as Baba. He later wrote to Jog in a state of confusion, feeling that Baba had "deceived" him. His disappointment stemmed from the fact that the promised visit occurred in a manner he did not expect or recognize, and he felt he had been denied the profound experience he had so eagerly awaited.