There is this possible Death;
Matthew LEARY, September 1838, I of Wight, 8 129
There has to be a reason Rosina and sibling/s ( cant remember how many from the other thread) ended up in the Workhouse. The Mother may have had to leave them there if she was unable to support them as a Widow.
There is a Marriage;
Margaret LEARY, September 1840, Alverstoke, 7 39
May be related or not.
As we have no idea of Mother Margarets date or place of birth it is almost impossible to check out all the possible spouses on that Reg .
As Rosina was 9 in 1841 Census and 18 in 1851 there will be no Birth Cert for her as she was born before Civil Reg began.
Her Sister Hannahs Christening found on the other thread is the only possible lead so far other than Census and Certs you have.