Hi,
Do you have the marr cert. of Mary Davies and Samuel Baker Dec.1887 Llanelly 11a 1269. It would give address of Mary.
Also the 1891 Census shows Samuel and Mary Baker with two children. Mary Ann Baker age 2.freebmd gives birth as June 1888 Llanelly. Samuel Baker age 1 born 1890 but cannot find a birth in Llanelly on Freebmd so could have been at husband's home. Could not find a birth of Father Samuel 1859 at Llanelly so could have gone to Llanelly looking for work as so many men did and born out of County. I would suggest looking at 1891 Census. I do not have subscription unfortunately. You could then track Mary Davies on 1881 Census or purchase Birth Cert of daughter Mary Ann. Hope this helps.