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One Latter-day Saint remembered that Brigham Young "requested the very best teams and outfits the Latter-day Saints could provide. The move from Winter Quarters to the Salt Lake Valley saw Green Flake once again giving his all. He was a part of the first group of Latter Day Saints to leave Nauvoo for the West and participated in the initial establishment of Winter Quarters, Nebraska. However, Flake was not only present for but played a part in several key events in the church's history. Scholars have since agreed that it is unlikely that he ever met Joseph Smith. According to histories, Green was "a big man, weighing over 200 pounds" and so definitely capable of the task. Popular legend says that for a time, Green Flake lived with Joseph Smith and acted as his bodyguard. At the time, the church accepted Green's labor as the Flake family's tithing. Green assisted the Flakes in building a new brick home, and also worked on various church projects. William Jordan Flake, eldest son of James and Agnes, remembered "being taken to the top of the Nauvoo Temple by our Negro servant Green, and viewing the surrounding country for miles in every direction. In Nauvoo, Green became very active in the church. The Flake family, Green, and two other slaves moved from Mississippi to Nauvoo in 1844. James in turn allowed him to remain with the Flakes, although he would keep his status as a slave. Green, however, refused to leave the family. Before the family left, James freed all of his slaves. Shortly after Green's baptism, the Flakes made the decision to leave their successful plantation and migrate North to Nauvoo, Illinois, in order to be closer to the main body of Latter Day Saints. Green came to believe the words of the man who enslaved him, and was baptized in the Mississippi River on Apat the age of sixteen. James began sharing his beliefs with his friends, acquaintances, and his slaves. Their baptism brought immediate changes to the James Flake plantation. Although skeptical at first, the Flakes were baptized a few weeks later. Clapp, a missionary from the Church of Jesus Christ of Latter Day Saints. In the winter of 1843–1844, a stranger knocked on the door of the Flake home.
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James and Agnes Flake, their three-year-old son William, and Green (along with their other slaves) moved from North Carolina to Mississippi a few years later. At the age of ten, Green was given to Jordan Flake's son James as a wedding present. Green Flake was born a slave on the Jordan Flake Plantation in Madsburr, Anson County, North Carolina.
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