When / if you obtain the 1903 Cert from the address I showed earlier, it should verify - via Father's name - if this is the 'correct' Maria Slade...
1881 - RG11/3703; Folio: 41; Page: 21 - West Derby
33 Sissant St
George Slade 46 Head Butcher born Devon, Shobrooke?
Eliza Slade 46 Wife Devon, Exmouth
John L. Slade 15 son Apprentice Plumber Devon, Shobrooke
William Slade 14 son Devon, do
George Slade 11 son Devon, Exmouth
Maria Slade 5 dau Liverpool