I believe my husband's family connects to your line. There were some slight name differences in your posting compared to name entries in our family bible. Your posting notes Benjamin F. Gallahan and the notes in our family bible state Frank Gallahan married Mollie Horten.
Our family bible entries note that Frank Gallahan and Mollie Horten had the following children:
(my husband's family descend from Raymond)
Raymond Gallahan b. May 15, 1888, d. Nov. 7,1970
Pearl Douglas Gallahan
Maddie Lee Gallahan
Lillian V. Estelle Gallahan