Great Master Sawan Singh Ministry: 1903 to 1948 [Retired from Army service, however, in 1911, at which time he established residency at the Dera] Guru: Jaimal Singh Successors: Jagat Singh; Kirpal Singh; Pritam Das; Mastanaji of Baluchistan Center: Dera Baba Jaimal Singh, Beas Distinctions: Perhaps the most influential Radhasoami guru of the 20th century; responsible for developing the largest Radhasoami group in the world. Sources: Glimpses of the Great Master; Heaven on Earth; and Spiritual Gems.