i had an aunt who disappeared from the record around 1919, 1920. my father never mentioned her, nor any aunt or uncle on that side. i heard of her from a cousin who said that she'd gotten pregnant, and i looked into the census and there she was. the last time i was over i spent an afternoon in the National Library where i was given very helpful assistance, as far as it could go. i see in the report that "mother and baby homes" is lower-case; i've been used to hearing "Magdalene Laundries", and there was another term which i have written down somewhere, a name for homes run by methodists iirc. the first thing i discovered is that there will be no help in tracing any individual. i would have a first cousin who would be about 100 now and it's not impossible that s/he is still with us. (the Justice for Magdalenes website appears redesigned and expanded since i last visited, perhaps there'll be more info there now.)
the table of contents lists two chapters "the situation before 1922" and "county clare nursery", so i'll be having a look into those.