Davis from Ireland to Engalnd Birmingham

DAVIS – The Davis line I have been following begins as this point with Joseph Davis who was born in Ireland in 1815, his occupation was a ‘spiker’ as listed on the British 1851 census, and his wife was Jemmima; she was born in 1820 in Shorpshire, England.
Between them they had four children: Ann Davis (b: 1842), Joseph Davis (b: 1844 ), Allis [Alice] Davis (b: 1847) & Thomas Davis (b: 1849). Joseph Junior is my ancestor, and he married Hariett Henn. Of the other three children I know very little. I would like to find out what happened to Joseph siblings, and also find out who Joseph senior’s parents were.