According to the writing on the back of the photograph, the ladies in black are, from left to right, Ethel Furey, Catherine "Katie" Furey, Isabella "Belle" Furey, and Jane "Jeanie" Furey Horrell. The child may be Miriam Horrell. The men were unidentified.
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The school building went on to become Covington High School, Covington Middle School, Schoen Middle School, and then (and currently) the central office of the entire St. Tammany Parish School System, the C. J. Schoen Administrative Complex.