FreeBMD gives the birth as:
March qtr 1857
Mutford district vol 4a, page 682
Riches, Margaret Hannah
And this looks like her and her family in 1861?
Reference RG09, Piece 150, Folio 12, Page 18
Alfred Cottage, Alfred Place, Hornsey Road, Islington
Riches, Edward Head M 36 Journeyman Brick Layer b Brook, Norfolk
Riches, Hannah Wife F 36 b Brook
Riches, Roseannah Daughter F 15 b Brook
Riches, Henry Son M 11 b Ditchingham, Norfolk
Riches, John Son M 9 b Bungay, Suffolk
Riches, Margaret Daughter F 3 b Swainsthorpe, Norfolk
Riches, Alice Daughter F 11 months b Islington