He met Swami Bhakti Hridaya Bon, a disciple of Hindu spiritual reformer Bhaktisiddhanta Sarasvati Thakura.
[1] First, though, Sadananda came in contact with Swami Hridaya Bon Maharaja, a disciple of Bhaktisiddhanta, when the latter visited The State Picture Gallery in Berlin, Germany, in 1933 during his missionary activities in Europe.
Ramdas mentions this meeting in his work "In the Vision of God" and describes him as follows: "Sadhu Sadananda had been, it appears a Professor in a German University and was a man of great learning and attainments.
"[4] During the Second World War (1939-1945) Sadananda was held in a British internment camp in Dehra Dun, India, where he met the Austrian poet Walther Eidlitz (Vamandas), who in the course of their imprisonment became his good friend and disciple.
Their main common work is Walther Eidlitz' book on Krishna Caitanya for which Sadananda provided the translations from the Sanskrit and Bengali sources.