Fla. Stat. § 7.07
The boundary lines of Calhoun County are as follows: Beginning at a point in the thread of the Apalachicola River where the northern boundary of township two north, range seven west, crosses said river; thence west on said township line to the thread of the Chipola River; thence southerly down the thread of the stream of the said Chipola River to a point where a line drawn through the center of township two north, crosses said river; thence west on said middle township line to the range line between ranges eleven and twelve west; thence south on said range line, concurrent with the east boundary of Bay County, to the southwest corner of section nineteen, township three south, range eleven west; thence east on the south line of said section nineteen and other sections across ranges eleven west, ten west and a portion of nine west to where said section line intersects the thread of the Apalachicola River between sections twenty-three and twenty-six, township three south, range nine west; thence follow the thread of said river to the place of beginning.
Fla. Stat. § 7.07