I have a Christina Fitzpatrick from Drogheda. She married John Quinn and had a child Francis Quinn in 1864. I am not sure of her father's name but do find a Thomas Fitzpatrick listed in 1886 directory. The street is the same residence as later relatives (Scarlet St.). He is listed as a 'post-car owner'. I have no idea what occupation that is. Any further info to tie into your Fitzpatricks will be appreciated.