This Elijah
Elijah 12/9/1830
appears very obviously in all censuses up to 1891 other than 1841.
There is an Elijah Moore in 1841 in Fosdyke, but born 1840, and wrong family. Census image is very faint. There are 9 pages in that area of Fosdyke, but could not see another Moore family there.
Wonder if Ann remarried, and hiding under wrong surname, or in workhouse under initials?
Added:
Similarly with George
George 20/1/1833
He is showing in censuses except 1841.
Both Elijah and George are servants in 1851, in Whaplode(Elijah) and Donington(George).