some info from several Thom's directories :
James street, Civil parish of St. James
1848
70, Tenements
107, Wm McCarty - boarding Hse
(there are several Ledwich, Ledwidge, entries in other parts of the city)
1863 :
70, Michael Ledwith - carpenter
107, Richard Ledwich - dairy
by 1877 the section where Michael lived of James Street was occupied by Arthur Guinness & Co. (68 to 81 and 83/84) In the same year 107 is occupied by a Thomas J. Ledwidge - dairy
Shane