Bruchko the Harvester

After this, the Lord appointed 70 others, and He sent them ahead of Him in pairs to every town and place where He Himself was about to go. He told them: “The harvest is abundant, but the workers are few. Therefore, pray to the Lord of the harvest to send out workers into His harvest.”
(Luke 10:1-2 HCSB ©®)

This is from The Luke 10 Manual (Steve & Marilyn Hill, www.harvest-now.org):

The story of Bruce Olson, pioneer missionary to the Metilone Indians (who named him Bruchko), a stone-age tribe of Central America, is very inspiring. He literally walked into the bush with nothing and into one of their villages. He certainly had no money bag or knapsack. He lived among them as one of them and learned their language without any contact, supply, or support of any kind from his American homeland. Several times he almost died from fever and was constantly battling parasites. Over the first couple of years he finally led one young man to faith in Jesus and began to believe that soon many others would follow.

However he became more and more frustrated with his first convert since he seemed to balk at any thought of sharing his faith with the rest of the community, constantly asserting that it was not yet his time. Olson could not understand why this new disciple refused to share anything with the others.

Since the culture of the tribe was oral, their history was passed on by each member memorizing their legends and reciting them at special recitation evenings as their turn came up in the rotation. Olson had listened to many of these recitations but did not get their significance until one day his convert told him that that evening was his turn to recite. His recitation that night included the account of a dream of one of the elders from long ago about a light skinned man who would come to them and tell them the truth about God’s Son from stacks of banana leaves. The convert recounted the dream, gave its interpretation and spoke of its fulfillment in Olson and the messages of God’s Son from the Bible. That night most of the tribe in the encampment became followers of Jesus.