1881 England Census Record info about Mary Sedman
Name: Mary Sedman Age: 59 Estimated birth year: abt 1822 Relation: Head Gender: Female Where Born: Gristhorpe, Yorkshire, England Civil parish: Burniston County/Island: Yorkshire Country: England 
Street address: Cross Lane Condition as to marriage: Windower Occupation: Charwoman Source information: RG11/4806 Registration district: Scarborough Sub registration district: Scarborough ED, institution, or vessel: 26 Folio: 95 Page: 14 GSU Number: 1342160
Ellen Readhead abt 1801 Gristhorpe, Yorkshire, England  Burniston  Yorkshire  
Mary Sedman abt 1822 Gristhorpe, Yorkshire, England Head Burniston Yorkshire

Ellen is listed on the census as Mary's mother.