How far from Dublin was James Cullen born?
James Cullen (mathematician): Father James Cullen, S.J. (19 April 1867 – 7 December 1933) was born at Drogheda, County Louth, Ireland. Drogheda:  It is located in County Louth on the Dublin-Belfast corridor on the east coast of Ireland, 49 km or 30 miles north of Dublin.
49 km or 30 miles