Hi, don't know if you are aware that Catherine George was previously married to a John Cosgrove.They married in Ardrossan 1860 and John died there 1870. Catherine's 1888 death is listed under all three names,Klang, George and Cosgorve.
Looks like they may have had 5 children, Catherine 1861
James 1864
William George 1867
Mary 1869
These 4 births are on SP. The '71 census shows a Margaret aged 1 who may or may not have been Mary.