Try FreeBMD at http://freebmd.rootsweb.comhttp://freebmd.rootsweb.com.It includes a complete extraction of the index info for ORFORD birth/marriage/death registrations 1837-1910. With this info it's easy to order b/m/d certificates.
The birth of Louisa Emily ORFORD was registered in 4th quarter 1880 (Westminster registration district, vol. 1a, p. 494).
The marriage of William ORFORD and Isabel Jane JACKSON was registered in Q3 1870 (Marylebone 1a 849).Surely the right people despite no middle name Henry and Isabel rather than Isabella.
Lots of possibilities for William's birth.But if you get his marriage certificate it will show his age and that should help identify the right one.