There's a possible Jane in 1861, 13 years old servant with the Spencer family in Deys Lane, West Derby, Head Robert 24 Lab, Wife Ellen 25, and sons James 4 and Robert 2, all born Lancs West Derby.
There are quite a few Thomas Blundell's in Liverpool, a couple of them with a daughter Jane but can't find any with a wife Jane also, have you considered that he might have been married twice?
If you think this Jane is possibly yours send me a pm with your email address and I'll send you the scan, also do you have any idea, possibly from later censuses, of Thomas and Jane's ages which might help narrow the search.