It is likely that this was an adoption through the Poor law Union and so the records of the local Poor Law Institute should be sought and checked for information on her admitance and release. If it was 50 years earlier it would have been considerable easier as the records for the Poor Law Administyration at that time are failry comprehensively indexed, the later records are in the form of various registers and minutes of meetings but in this case you do have a small window to search, i.e. approx 1865 to 1871. It is likely the child was left an orphan and so a check of the birth registrations for Grace on the GRo index fiorst would pinpoint a birth district and lead to the Union Workhouse and then you could search the death index for Wright deaths in the same district, possibly in the same quarter if the mother died in childbirth, then you have some info, alsdo you would have the chance to order the original birth registration for Grace which would probably give you at least her Mothers name.