Ok,
I've had a real hunt around for them all on the census' No sign of Marion, Helen, Elisabeth, Janet or Jean....It could be that they where married by the 51 census! I did find a Margaret Henderson on the 51 living at 76 Upper Ebury St, St George Hanover Square, Middlesex. She is an unmarried school mistress born 1822 Scotland.
As for the boys, There are 2 Roberts on the 51, One living in Kent born in 1817 Scotland although on the 61 census he's down as 1819. He's working as a land and house steward. The other is in Leicestershire born Scotland 1817 and working for the Inland Revenue.
On the 61 there are 3 roberts, the same 2 as above and another also living in Leicestershire, born Scotland 1818 and working as a wine and spirit merchant.
As for James, there are 4 on the 51, 1 in Nottinghamshire who was born in Scotland 1817 and working as a Carpenter. Another in Durham, born Noofen-Scotland 1817 and working as a mason. Another in Leicestershire born Scotland 1817 and working as an Enginesmith and finally another in Middlesex born Edenbridge, Scotland 1815. Works as a Tailor.
However this is interesting! On the 61 i have found a James Henderson in Middlesex;
1861 census, 48 Hawley Rd St Pancras Marylebone-
James Henderson head aged 47 occupation Foreman on Railway (Loco dept) born Scotland.
Annie Henderson wife 50 born Scotland
James '' aged 24 son occupation; Railway engineer born Scotland
Annie '' aged 23 daughter occupation; Dressmaker born Scotland
Edward '' aged 20 occupation; Railway engineer born Bedlington, Northumberland
Zellah '' aged 16 daughter occupation; assistant teacher born Northumberland
Ada '' aged 9 daughter. Scholar born northamptonshire
Marriages;-
Marion Henderson december qtr 1852, Wirrel district Cheshire to either George Locking or Archibald McMartin.
There are 8 Helen Henderson marriages between June qtr 1843 and September qtr 1858.
There are an awful lot of Margaret Henderson marriages!!
Janet Henderson marriage june qtr 1838 St Pancras 4 possible husbands to choose from! Id say the St Pancras James Henderson is looking likely! if this is them theyve worked there way down to London!
No sign of an Elisabeth tho!
Jean Henderson death east london march qtr 1846. cert no 2/145
I hope that this is of some help!
Penninah