city directory for youngstown, Mahoning, OH in 1875??? Thomas family

Was there a city directory for the year of October of 1875.
I am searching for a GriffithTHOMAS of Wales , wife Jane, that had been in Cambria Co.,PA in the 1860/1870 census and in Braddock, Allegheny Co., PA for the 1880 census.
However, they were in youngstown the 30 October 1875 for the birth of their son, Nathaniel.
Were they living there or just visiting. IF visiting, then WHO????

Griffith's dau, Mary A. was b/1837 in NY
David was b/OH 1838(have no idea where)
Margaret, Elizabeth, Alex, Ellen, & Catherine were b/Brady's Bend, Armstrong Co., PA
AND then Nathaniel in Youngstown......

Any assistance appreciated
Audrey