Hugh King Francis was my third great grandfather.  I too have the information that he was born in Clare, Ireland.  I have a record of a marriage of a Hugh Francis to Elizabeth Hawksworth in Handsworth, no Sheffield.  In the 1851 census he is listed as being a letter carrier and as retired in the 1861 census.  I have only just joined RootsChat hence the time lapse from your posts.  It’s also the first time I have seen the name outside of “official documents”.  The marriage was in 1829.  Hoping this is read and is of use.