From FreeBMD,
An Emma Hendry died in Kings lynn Dec Qtr 1881 at age 1. Looks like a possible for baby Emma. Another Emma Hendry also died in Kings Lynn in 1876 age 1, so perhaps the baby on 1881 census was their second daughter named Emma?
There are 4 other Hendry children who died in the Kings Lynn district at about age 1, in 1882, 1883, 1891, 1893. So unless there was another Hendry family around, it looks as if William/James and Sarah/Susan had rather unfortunate luck

subee, is it possible that Alice Maud is Alice Elizabeth's illegitimate daughter, whom she has the year before she marries? It certainly looks like that would add up. Whether Alice E. actually left Alice M. in the care of her grandparents permanently following her marriage, or if she just happened to be at their house on census night is another matter...
MJP