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Question 1 : Located along the Sunflower River, Dockery Farms was established in 1895. Although the early history of the blues is somewhat sketchy, it is believed that farm hand Henry Sloan was playing blues on the farm as early as 1897. There are no recordings of Sloan; his fame owes more to one of his Dockery protégés than his own work. Around 1900, the Patton family moved to Dockery farms, and one of the young Patton sons, Charley, became drawn to Sloan. In time, Patton became the most recognized figure out of a growing number of blues musicians in the area, and influenced subsequent generations of Delta bluesmen, such as Son House and Robert Johnson.
The author's main point in writing the passage seems to be: