Does anyone happen to know which Humphrey family this pamphlet refers to?

The Humphrey Family of the South
By Mrs Frank Ross Stewart, Alabama Genealogical Society
Published by Alabama Genealogical Society, 1959
40 pages

I am interested in one of the Humphrey families that lived in or around Huntsville/Meridian, Alabama or Decatur, Alabama.

I would like to know before I try to track a copy down.