The image of the marriage certificate is on FindMyPast
His father is also a miner
Her father is a labourer
Witness Edward Williams, and Mary Ann Williams.
1881 census Victoria Terrace #29, Walsall
Joseph Boyers 48 coal miner born Loughborough Lincolnshire
Amelia 50
Joseph 19
William 17**
Fanny 11 born Staffordshire
Caroline 8 ditto
Elizabeth 16 ditto