Complex sentence: Francis M. McDowell, one of the seven founders of the National Grange and its treasurer for 21 years was born in Wayne, NY and in the 1860's he returned to Wayne to grow grapes on the shores of Lake Keuka.
Split into simpler sentences: Francis M. McDowell, one of the seven founders of the National Grange and its treasurer for 21 years was born in Wayne, NY. In the 1860's, he returned to Wayne to grow grapes on the shores of Lake Keuka.