These ads include important genealogical information, such as Irish County of origin, siblings and other family members. They mention people and places all over the U.S., not just the Boston area.
I have created an index to the ads from volume 7, 1871-1876 which mentioned Troy, N.Y. (including S. Troy and Lansingburgh) There is much more information in the books themselves.
For more information about the "Missing Friends" series:
Name of person being sought Irish County of Origin Relative who placed the ad Relative’s address Vol/Pg. Brady, Alice (lived in Troy) Meath sister Jane O’Neil PA 7/227 Brogan, Patrick (was in Troy; went west) Meath Catherine Smith MA 7/561 Carlin, Patrick Mrs. Sarah Carlin Troy 7/518 Claffey, Farrell (in Troy) Westmeath daughter Mary Claffey Brooklyn 7/565 Conroy, John Westmeath father. Thos. Conroy Troy 7/600 Conroy, Mary Westmeath uncle Andrew Conroy Troy 7/594 Cooney, Thomas Limerick sister Mary Connors Troy 7/25 Dolan (Dowling?), Ann (lived in Troy) Longford son NYC 7/346 Duffy, Edward (lived in Troy) (was in Boston) brother Patrick Boston 7/372 Dunne, Patrick Kilkenny father John Troy 7/142 Fallon, Catherine Westmeath Mary Kelly Troy 7/562 Fallon, Mary Westmeath Mary Kelly Troy 7/562 Farrell, Ellen (was in Troy) Limerick sister Catherine MA 7/274 Flanning, Oliver Tipperary brother Edward Troy 7/245 Frisby, George Kilkenny cousin Eliza Regan S. Troy 7/334 Garigan, Peter (worked at Nail Factory, Troy) sister Maria Garigan Cohoes 7/49 Golden, John sister Mary Golden Troy 7/211 Guinan, Kieran (in West Troy) (see also Shaughnessy) Kings Matthew Guinan TX 7/549 Harrington, Daniel Cork brother Michael S. Troy 7/12 Hartnett, John father Patrick Troy 7/265 Hayes, John (in Hoosick Falls) Limerick John Hayes, Iron Works Troy 7/581 Heffern, Dennis Cork brother John Troy 7/189 Hines, Thomas (left Troy) cousin Thos. Hines CT 7/588 Kelley, Ellen Tipperary sister Lizzie Troy 7/190 Kelley, James (in Troy) Kilkenny T.K. Rogers Toronto 7/601 Kelley, John (in Troy) Kilkenny T.K. Rogers Toronto 7/601 Kelley, Mary Tipperary sister Lizzie Troy 7/190 Kelley, Patrick (in Troy) Kilkenny T.K. Rogers Toronto 7/601 Kennedy, Bridget niece Honora Heffernan Troy 7/356 Kennedy, Eliza niece Honora Heffernan Troy 7/356 Kennedy, Honora niece Honora Heffernan Troy 7/356 Kennedy, Johanna niece Honora Heffernan Troy 7/356 Kennedy, Kate niece Honora Heffernan Troy 7/356 Kennedy, Mary niece Honora Heffernan Troy 7/356 Kimmage, James (was in Lansingburgh) Kildare Sarah Moore PA 7/316 Kimmage, Thomas (was in Lansingburgh) Kildare Sarah Moore PA 7/316 Kimmage, Wm. (was in Lansingburgh) Kildare Sarah Moore PA 7/316 Long, Patrick (in Troy?) Kerry nephew Patrick Long MA 7/343 Mahony, Johanna (lived in Troy) Tipperary brother Thomas PA 7/170 Maloney, James (was in Troy 1873) Clare brother Thomas Albany 7/302 McCarty, Michael Cork sister Margaret Scofield Phila 7/150 McCarty, Patrick Cork sister Margaret. Scofield Phila. 7/150 McCrossin, Isabella Tyrone sister Martha Canada 7/260 McCrossin, James (was farmer between NYC & Troy) Tyrone sister Martha Canada 7/260 McCrossin, Nancy Tyrone sister Martha Canada 7/260 McGough, Thomas Monaghan brother Peter Troy 7/135 McKnight, David Limerick brother James Troy 7/140 McNamara, John (lived in Troy?)* Limerick sister Honora McNamara Oneida 7/219 McNamara, Patrick, Jr. (lived in Troy?) * Limerick sister Honora McNamara Oneida 7/219 McNamara, Patrick, Sr. (lived in Troy?) * Limerick daughter Honora McNamara Oneida 7/219 Moroney, Patrick Limerick John Costelloe Troy 7/118 Murphy, Cath Sullivan Cork cousin Johanna Twohig Troy 7/528 Murphy, Daniel Cork cousin Johanna Twohig Troy 7/528 Murphy, James Cork cousin Johanna Twohig Troy 7/528 Murphy, Thomas Kilkenny sister Mrs. Joseph Ryan Troy 7/386 O’Brien, Mary Roscommon brother Owen Brien R I. 7/48 O’Halloran, Catherine Limerick sister Mary Troy 7/300 O’Halloran, James Limerick sister Mary Troy 7/300 O’Halloran, Michael Limerick sister Mary Troy 7/300 O’Halloran, Stephen Limerick sister Mary Troy 7/300 Quinn, Charles (was in Troy) Tyrone nephew James Quinn Baltimore 7/593 Quinn, James (was in Troy) Tyrone nephew James Quinn Baltimore 7/593 Quinn, Wm. (was in Troy) Tyrone nephew James Quinn Baltimore 7/593 Shaughnessy, Michael (in West Troy) (see also Guinan) Kings Matthew Guinan TX 7/549 Sullivan, David Cork cousin Jo Twohig Troy 7/528 Sullivan, Dennis (was in Troy) Tipperary niece Mary Mullins MA 7/253 Sullivan, John (was in Troy) Tipperary niece Mary Mullins MA 7/253 Toohey, Wm. Galway brother R. Toohey Troy 7/549Troy's "Missing Friends" and Irish Immigrants
The source of this data is the 7 volume book series entitled "The Search for Missing Friends: Irish Immigrant Advertisements Placed in the Boston Pilot", edited by Ruth-Ann M. Harris, Donald M. Jacobs and B. Emer O'Keefe. Boston: New England Historic Genealogical Society, 1989. These books reproduce advertisements that were taken in the Boston Pilot newspaper from 1831-1876 by Irish people who were looking for missing friends and relatives. The books are indexed by surname, and also place names in Ireland and the U.S.