The details of Isaac and Sarah's marriage are in the original post, 2nd paragraph.

I can only see the detail relating to birth in Redbrook,
Name: Sarah Morgan
Year of Registration: 1857
Quarter of Registration: Jan-Feb-Mar
District: Monmouth (1837-1939)
County: Gloucestershire, Herefordshire, Monmouthshire
Volume: 11a
Page: 30

but not the detail from the later marriage certificate in Ince / Wigan

Name: Isaac Fletcher Taylor
Name: Sarah Morgan
Year of Registration: 1878
Quarter of Registration: Apr-May-Jun
District: Wigan
County: Greater Manchester, Lancashire
Volume: 8c
Page: 25