Thank you everyone for your replies this gives me more avenues to now explore. Mary it would appear very likely that Edward J Martin could be Emma's father but I can't prove it so far as RootsIreland lists the following children below for an Edward, a schoolteacher and Eliza Martin of Kilglass in Ahascragh but no Emma is listed. I also believe Emma is the brother of my Great Great Grandfather Henry Needham Martin but again I can't prove that Edward J Martin living in Kilglass is the father. I have proven that Emma is Henry's sister as her son was mentioned in a newspaper article as the nephew of the late Henry Needham. The children listed for Edward J Martin and Eliza were:
MartinEllen1843Co. Galway
MartinJohn1846Co. Galway
MartinElizabeth1839Co. Galway
MartinJulia1849Co. Galway
MartinCaroline1853Co. Galway In an article by the Shepton Mallet Journal at Henry Needham Martin's funeral there is mention of a Rev John W Martin and in brackets brother which might suggest that the Edward Joseph Martin above was Emma and Henry's father but either there names were not recorded at birth or they were half brother and sister to the children of Edward Joseph Martin and Eliza. I also know that Henry Needham Martin was born about 1843 which was very close to Ellen Martin's recorded birth. Thanks once again everyone the search to prove that the schoolteacher at Kilglass is my Great Great Great Grandfather continues. Regards Philip