Marriage lookup please

[audrey]

Samuel Spencer head M Male age45 coal miner Wales 
 Sarah SPENCER   Wife   M   Female   46   Wales       
 Sarah Ann SPENCER   Daur   U   Female   19   Wales       
 Thomas SPENCER   Son   U   Male   17   Wales   Coal Miner     
 Edward SPENCER   Son   U   Male   16   Wales   Coal Miner     
 Mary SPENCER   Daur      Female   11   Wales   Scholar     
 Iso...ia SPENCER   Daur      Female   7   Wales   Scholar [ this must be Jemima]
the above is from the 1881 census    office Row Trimdon Durham England
Jemima married William Francis he was born hollywell Flint 23/7/1870 .marriage was in 1891 in Durham  but I can not him on 1881 census nor can I find either of the on 1891 from the birth of the first son Thomas William Francis born 9/9/1893 in Hollwell they must have returned to Wales for several years returning again to Durham 1905
Thanks for the offer Paul I am just returning to this side of the family as I wrote it off
Names connected are JONES and Foulkes

Audrey