He visited Moscow twice, first with Bhai Santokh Singh in 1923 and then alone. In Moscow, he met Lenin and other Russian leaders and attended the Fourth Congress of the Communist International. He carried the Communist International message to many European countries and visited India incognito several times. He also helped with funds collected abroad the Punjabi magazine, Kirti, launched by Bhai Santokh Singh from Amritsar in February 1926. Ratan Singh died in a hospital in Italy in September 1943.
References :
1. Josh, Sohan Singh, Tragedy of Komagata Maru. Delhi, 1975
2. Johnston, Hugh, The Voyage of the Komagata Maru. Delhi, 1979