Mud at the wall really .

Im having great difficulty in tracking down my Gt.Grandmother Annie ( could well be Mary Anne ) Meehan . I have been informed by a family member that she was in a convent in Liverpool ( the Ford convent was mentioned )
& around 1885-1890 .

I cant find her on the 1891 census ( she would have been 18 then )

Im playing detective really & would like to know if any of you know about this place ??? Or even might have the address ??? Does it still exist ??

Any experts /specialist in this area ?

Any help /pointers is most appreciated