Jahnava: After Srila Prabhupada’s lecture, he went back to his apartment and we all got ready for bed. Thirty minutes later word got out that Srila Prabhupada had come back. We scrambled together, came into the temple room and sat there expectantly. Srila Prabhupada was grave. At first he didn’t say anything. He played a tape of Vande ‘ham with himself on the harmonium and said, “I have just received a telegram from India saying that His Holiness Keshava Maharaj, my sannyas guru, is no more. He has entered Krishna’s abode.” Srila Prabhupada said that Keshava Maharaj was a Vaishnava, an ocean of mercy, and he said, “I am offering my respectful obeisances to him along with my disciples.” As he talked, he remembered Keshava Maharaj, and a tear slowly came and hovered a little while. That tear was like the shining diamond of his separation from his sannyas guru, it was such a beautiful tear. And at last it fell.
Source: Remembrances by Sidhanta Das – Folio Vedabase