A few bits from newspapers. There are loads of adverts between about 1905 and 1917 reading:
Patients received into nurses home, attended during confinement. Terms Moderate. Nurse nolan, 17 Portland Place.
Also Wednesday 22 August 1906 Ellen McDonnell gave evidence into the death of 2 year months old Mary Kavanagh "a nurse child" who died the previous Monday. She says the mother of the child gave birth at her house and the child was healthy. Later Ellen McDonnell had answered a newspaper advert placed by a woman named HILL of 41 Patrick street who was looking for a child to nurse or adopt. The mother and McDonnell decided to place the baby with Mrs Hill for 1 month and the mother paid 14s. later Mrs Hill said the child was doing "splendidly" and the mother decided to pay a further £6 for the adoption. The inquest found that the child had died of natural causes.
also Ellen McDonnell (widow of John McDonnell of Leinster St) died 1924
edited to correct age of Mary Kavanagh