If the 1901 Census entry is correct - it is written in a legible hand and is very clear - Henry Jones mother-in-law is definitely Mary A HOWARD. Henry's wife is definitely MAY not MARY. Henry's age is given as 52 which tallies with the 1881 and 1891 Censuses. The marriage between Henry JONES and Mary HOWARTH uses different names (although admittedly close) for his wife and an age difference of some 10 years for Henry. FMP doesn't give any further sightings of Henry or of any member of his second family, and a new family altogether are living at his 1901 address in 1911. This isn't helpful to you. So ... Have you considered: 1. Emigration? 2. The couple not being formally married? 3. The couple being 'married' in a non-established venue? As Henry was a widower they would have had to have had a licence (I think) but there's no evidence of one. 4. May HOWARD still married to someone else from whom she has separated? 5. May HOWARD being a widow herself - therefore her (1st) married name will be unknown. That's my lot - but I don't have access to Ancestry! So who knows . Ruth