There was no birth of an Ellen Pallister (or of any variant spelling) registered anywhere in England or Wales in 1852. Ages given at death can be misleading, and are not reliable. The nearest I have is an Ellen Pallister born in Kent in 1847, or Ellen Crosfield Pallister born Wetherby in 1865, or Ellen Pallister born Durham 1866. Other than that is an Ellen who married a Richard Palliser, and she was born in 1852, but still living in England in 1881. The only Ellen Pallister born 1852 is an entry in the IGI without parents, entered by an individual, quite possibly from the same age at death info that you have?
Do you know when your Ellen emigrated, or when she married Gad Parkin? (What is Gad short for?) For clues, do you know the names of her children?