I think the birth place of Emma Hanks is Somers Town, which is south of Camden Town in London. I do not know what district or parish this comes under though.
I shall do some searching and see if I can find out who she is. If she had siblings, they could well have been born in Somers Town as well.
Also notice (on the 1861 census) that Eliza Babb Blades' middle name is shown as being a B, strengthening my feelings that her middle name is Babb and not her surname.
Addendum: found her in 1871 and yes, she's born in Somers Town (but I did not need to use that as part of the search criteria)
RG10/313/71/43
That makes her mother Emma Eliza Blades, then?
Addendum 2: it seems in fact Emma Eliza Blades married someone with the surname Willey before marrying Frederick William Hanks.
Marriages Sep 1848
Hanks Frederick William Newington 4 382
WILLEY Emma Eliza Newington 4 382
Addendum 3: the marriage certificate confirms this
Frederick William Hanks married Emma Eliza Willey on 20 August 1848 at the Parish Church of St. Saviour Newington, Surrey.
Both are of full age.
Frederick William Hanks is a bachelor, working as a Draper, of St. George Hanover Square; his father is William Hanks, deceased
Emma Eliza Willey is a widow, of Beresford Street; her father is Joseph Blades, Gent.
Witnesses: Frederick James Blades and Thomas Charles Blades