I too am searching for the elusive F/F link but keep hitting a wall.
The link I am searching is Heneretta Flynn (Detroit Michigan) married to a Patrick or Michael Finnegan and having two sons William Henry Finnegan and Walter Shear Finnegan....The fathers name is questionable due to my grandmothers memory..it is her husbands(william)side I am researching and he died in 1993 with Altzheimers.... any connection to your F/F line?