When I purchased the 1881 census a neighbour asked me to look for her 
SARAH HORSFIELD in the Drax area.  Sarah was not there nor was any of her family- ok she'd moved was the first reaction.  All variations of the name were tried we even tried looking for Sarah in Drax - still no luck.
When the 1871 census came out we searched Drax, picked on a name and searched for them in the 1881 census via the neighbours option.
Bingo, Sarah and her family were listed as 
HORSEFEEDERwell, would you have thought to try Horsefeeder as a variant of Horsfield ?  No ! neither would we, but it took us about 5 years to find her, but find her we did along with her parents and siblings.  
Thank goodness for the neighbours option.
Carol Sklinar
www.wakefieldfhs.org.ukWakefield Family History Sharing