I believe that this Preston Edmonds is the son of the Preston Brown Edmonds Sr.  I don't know the connection with Mr. and Mrs. Will Hall or Miss Lena Kirby.  Miss Laura Edmonds could have been the younger sister of Preston Edmonds because one piece of information states that P. B. and Angeline Crowder Edmonds  (the parents of Preston Edmonds in this picture) had a daughter named Laura who died young.