What was Dev's reaction when he finally found out that the Sanyasi at his feast was actually Sai Baba in disguise?

When Dev learned the truth, he was overcome with emotion. Chapter 40 recounts that after Jog sent a detailed letter explaining how Baba had indeed attended the Udyapan as a Sanyasi, Dev's eyes "overflowed with a surge of love." He felt immense regret and shame for his lack of perception and for having doubted the Master. He exclaimed, "Shame, shame! I blamed Sai in vain!" This realization made him feel very dejected in his mind, recognizing the greatness of Baba and lamenting the pride of his own knowledge that had blinded him to Baba's divine presence during the ceremony.