The common boundary line between the counties of Seminole and Volusia, from the place where the St. Johns River enters Lake Harney to the corner common to Volusia, Seminole, Orange and Brevard Counties is more fully defined, located and described as beginning where the center line of the St. Johns River enters Lake Harney at a point approximately seven hundred feet west of the south half mile post of section twenty, township twenty south, range thirty-three east, thence southeasterly following the center line of the St. Johns River to Puzzle Lake at a point one thousand feet south and three hundred feet west of the east half mile post of section four, township twenty-one south, range thirty-three east, thence southwesterly to a point in Puzzle Lake six hundred sixty feet north of the southwest corner of the southeast quarter of the southeast quarter of said section four, thence south one and one eighth miles through Puzzle Lake to the south line of section nine, thence southeasterly to the point where the center line of the St. Johns River enters Puzzle Lake in the southwest quarter of section fifteen, township twenty-one south, range thirty-three east, thence southeasterly along the center line of the St. Johns River and the easterly channel thereof to a point in the southeast quarter of section twenty-seven, township twenty-one south, range thirty-three east, where the two channels unite, thence following the center line of the St. Johns River southeasterly to a point approximately four hundred feet east of the south half mile post of section thirty-five, township twenty-one south, range thirty-three east. Said point being corner common to Volusia, Seminole, Orange and Brevard Counties.