You should find your lady in Births Deaths Marriages BDM in Dublin. Certificates can be bought online.
Boyle is in the Parish of Ardagh & Clonmacnoes.
The Parish of Elphin is about 1800 sq miles,from north of Sligo to south of Athlone, within that area you could have 2500 townlands! Each Townland has a Name describing the land.example a mound = Sonnagh / Sonagh
MANY WILL HAVE THE SAME NAME. your lady could be born in any of these Townlands.
The easy way to find your Lady, list all the Brigid Nolan,s born within 1 /2 years of 1880 at the BDM.(all online) Separate the ones in the Parish of Elphin. decide & apply for the Birth Certificates less than 10 DOLLARS. There are lots of free websites to get Genealogy.
Hope this helps.
I know the area in Ireland very well, over 60 visits & spent several years tracing all my wife,s family, since then have met them twice. Now looking for "Bannon"
Best of Luck
from Ray firstname.lastname@example.org