Complex sentence: Four years later Phillip Gatch decided to sale 125 acres to Ambrose Ransom, which soon after sold 64 acres to John Hageman, who was the first permanent settler and named the area Hageman's Mills.
Split into simpler sentences: Four years later, Gatch decided to sell 125 acres to Ambrose Ransom who, soon after, sold 64 acres to John Hageman. Hageman became the first permanent settler and named the area Hageman's Mills.