The Lever, Bolton death in 1878 for Sarah Ellen Buckley is another Sarah Buckley, also born in 1874 (MMN = NORRIS).
General Notes
What happened to Sarah? On the GRO her mother's name was GREENHALGH, wheras on the BMD index it is HOLT. This could be the death of Sarah Ellen, in 1878 aged 4. The other Sarah Ellen Buckley, born 1874, is the daughter of Levi Buckley and Jane Ann Norris, and she did not die an infant.