Just a thought. The Walthew family were often Catholics. It may be you need to look in RC records
Edward W
Walthew family here in Garston 1891 census
James Frederick aged 38 b Lancashire Cotton Merchant ( born Prescot about 6 miles from Garston )
Josephine aged 34 b America British Subject
Triphena M aged 5 b Cheshire
Frederick E aged 4 Canada
Dorothy R aged 3 America
...........................................................................
Name Millington James Walthew
Gender Male
Christening Date 24 May 1840
Christening Place St. Mary's, Walton-on-the-Hill, Lancashire, England
Birth Date 10 Apr 1840
Father's Name Millington Walthew
Mother's Name Ann Walthew