Sarah and Alexander Gibson married in Dromore, Down, Ireland in 1858 and moved to Calton, Glasgow. Their daughter Sarah Mitchell Gibson was born in 1869 in Dromore and son Alexander in Calton in 1864. William b 1860 in Dromore, and John b 1862 in Dromore moved to Bolton, Lancashire, around 1880. Sarah died in Calton in 1872 aged around 37. What happened to Alexander senior, Alexander junior and Sarah Mitchell Gibson? I can find to trace of them after the 1871 census, although I may have found Alexander senior living as a lodger in Argyle Street, Dalziel on the 1891 census as a Plasterer's labourer.