1. Agastya,
2. Lopamudra.
The remaining two are Puroraba and Sarama. Try to trace them. God alone knows where you will get them from."
I went to Medhananda's library and found them: one in Prabartak and one in Bartika. When I handed them to him he gave me a very broad smile.From:Sri Chinmoy,A service-flame and a service-sun, Agni Press, 1974
Sourced from https://srichinmoylibrary.com/sf