Srila Prabhupada said:
In 1936, just on the 13th, December, I wrote him one letter. Not 13th. I think by the beginning of December, 1936, I wrote one letter to Guru Maharaja. I knew he was little kind upon me, so I wrote that "Guru Maharaja, you have got many disciples. I am also one of them. But they are doing direct service to you. Some of them are brahmacaris, some of them sannyasis, but I am a householder. I cannot…" Of course, I was giving sometimes some monetary help, but I could not give any direct service, so I asked him that "If there is any particular service I can do for you?" So that letter was replied in 13th December, dated 13th December, from Puri. And he passed away on the 31st December. Just a fortnight before. So the reply was the same as he wanted me to do this preaching work in 1922, when I first met him, that "You try to preach whatever you have learned from me to the English-knowing people in English. That will do good to you and to the people to whom you shall preach. That is my instruction."
From Srila Prabhupada's lecture on His Divine Grace Srila Bhaktisiddhanta Sarasvati Gosvami Prabhupada's Appearance Day — Los Angeles, February 7, 1969