Sorry for delay. The book didn't have John D. Parker, but it has John Parker and John H. Parker.Page 253, "Dr. E. S.C. Parker seemed content to live on his farm which he opened early, west of Nixburg and attended to his mill and practice until 1863 , he was induced to go to the House , and after that settle down to the old routine.He married a daughter of Henry Lee, an early settler and hotel keeper at Nixburg. His son John, became a lawyer both at Rockford and Wetumpka, and was senator 1888 to 1892, and a delegate to the Convention of 1901. He died at Wetumpka in 1902." Page 241 lists John H. Parker's wife as Alice, daughter of Alexander Smith.
Other Parker names listed: Clay, Elias, Joseph, Monroe, Munro, and Robert.