Searching for birth details of Eliza and Mary Walsh - immigrants to Australia as Famine Orphans 1840-1850.
Possibly from Castlelost, Westmeath.
Parents may be Peter Walsh and Elizabeth (nee Sweeney).
Hello Rosalie,
Castlelost has it's own dedicated page, posting your query there might produce a better response.
http://www.irelandxo.com/group/castlelost-westmeath
Best regards Michael.