The name Prosser caught my attention because my Harries family from Solva have a link to some Prossers by marriage. So I had a look in the 1881 census for any Prossers around that age and found one that seemed like a a shot in the dark at first, but...
RG11 5418 / 41, pg 3
Haverfordwest St Thomas, Pembroke, Wales
Merlins Hill
John PROSSER Head M Male 33 Haverfordwest Commercial Traveller
Hannah M. PROSSER Wife M Female 28 Swansea, Glamorgan, Wales
William H. PROSSER Son U Male 2 Haverfordwest
Mary E. PROSSER Daut U Female 7 m Haverfordwest
Ellen REID Servant U Female 14 Haverfordwest Domestic
I know the age is off by 3 years and the name isn't exact (don't know what "H" stands for). But the fathers name is John and if you check the IGI database (
www.familysearch.org) you'll find a John Prosser of Haverfordwest death in 1897.
A search at Free BMD gives us some more proof that I think you'll like. If you look for the marriage of this John Prosser to Hannah in Haverfordwest you find their marriage in 1877. And guess what: Hannah's full name is Hannah Maria EVANS.
I suggest posting an 1891 census look-up request on the RootsChat census look-up board for this family and see what you get. Looks like the family stayed in Haverfordwest until 1897. Or at least, the father did.
Happy Hunting!
Jeff