This could be John in 1891.
Clough Rd, Masbrough, Rotherham.
Hannah Wood, head, wid, 35, b. Dewsbury,
John H. Wood, son, s, 19, Brick Maker, b. Dewsbury.
Henry Sharpe, lodger, s, 42, General Labourer, b. Ivison
RG12/3849/94/22
Can't see them in 1881.
Ann's other post "Wood family Masbrough Rotherham" gives further info on the family. Not sure how to post a link to it. Has Johns father, James Wood and first wife Mary Jepson, living in Masbrough in 1851, Conisborough 1861.
Looks like John Henry was just born a bit later than Ann thought, his marriage cert should confirm.
Alan.