I have Mumby's listed in the 1851 census for Great Grimsby,Lincoln. They are as follows: Robert Mumby 46 born North Coats Lincoln, Ann wife 49 born Bonlay? Lincoln,Edward son 14 born Fulstow Lincoln,Delliah daughter 11 born Fulstow Lincoln.Robert Mumby servant 15 born Fulsow Lincoln.William Mumby 39 born Keilby?, Sarah wife 38 born Humberstone,Maria daughter 10 born Scartho Parish,Joseph son 8 born Scartho, George son 6 born Scartho Parish, Henry son 4 Born Scartho,Elizabeth daugther 2 born Scartho, Sarah niece 10 visitor born Grimsby. There are also several other families listed in the census. If anyone is interested let me know.