I'm not seeing a John Harrison on the 1881 census?

Reference RG11, Piece 3394, Folio 4, Page 2
5 Court 1, Lower Thorn Tree Lane, St Peter, Derby
Riggett, Benjamin Head M 52 Labourer at Gas Works b Taddington, Derbyshire
Riggett, Hannah Wife F 46 b Nottingham
Riggett, William Son M 20 Labourer in Silk Mill b Derby
Riggett, Sarah J Daughter F 18 Domestic Servant Out of Employment b Derby
Riggett, Emily Daughter F 10 Scholar b Derby
Riggett, Ernest Son M 7 Scholar b Derby
Riggett, Frederick Son M 5 Scholar b Derby