| A hidden phase of American history : Ireland's part in America's struggle for liberty | O'Brien, M. J. | Monograph or Collective Volume | Genealogical Publishing | 1973 |
| An authoritative account of the earliest Irish pioneers in New England | O'Brien, M. J. | Article in Journal | | 1919 |
| An interesting example of the extent of Irish emigrations to the American colonies | O'Brien, M. J. | Article in Journal | | 1928 |
| Early Irish families in Virginia | O'Brien, M. J. | Article in Journal | | 1916 |
| Early Irish settlers at Worcester, Mass. | O'Brien, M. J.Towne, W. H. | Article in Journal | | 1919 |
| George Washington's associations with the Irish | O'Brien, M. J. | Monograph or Collective Volume | P. J. Kennedy | 1937 |
| Irish immigrants from English ports in the eighteenth century | O'Brien, M. J. | Article in Journal | | 1919 |
| Irish immigrants to New England - extracts from the minutes of the selectmen of the town of Boston, Mass. | O'Brien, M. J. | Article in Journal | | 1914 |
| Irish pioneers in Hartford county, Connecticut : extracts from the land, church, probate and military records | O'Brien, M. J. | Article in Journal | | 1928 |
| Irish settlers in Connecticut in the seventeenth and eighteenth centuries | O'Brien, M. J. | Article in Journal | | 1925 |
| Irish settlers in Orange county, New York | O'Brien, M. J. | Article in Journal | | 1928 |
| Irish settlers in Pennsylvania | O'Brien, M. J. | Article in Journal | | 1906 |
| Irish settlers in Queen's county, city of New York | O'Brien, M. J. | Article in Journal | | 1928 |
| Some early Murphys in North Carolina | O'Brien, M. J. | Article in Journal | | 1911 |
| Some traces of the Irish settlers in the colony of Massachusetts Bay | O'Brien, M. J. | Article in Journal | | 1919 |
| The Irish in New London, Conn., in the 17th and 18th centuries : the interesting diary of Joshua Hempstead | O'Brien, M. J. | Article in Journal | | 1927 |
| The Irish in the American colonies | O'Brien, M. J. | Article in Journal | | 1927 |
| The Irish in the Dutch records of the city of New York | O'Brien, M. J. | Article in Journal | | 1928 |
| The Irish in the New Jersey probate records | O'Brien, M. J. | Article in Journal | | 1928 |