Hi Ian, I am just researching this family this morning. I can give you the information I have collected. Your Neil McTaggart was born abt 1853 Campbeltown. Have found no rec of his birth butfrom his mar 21 Mar 1871, I was able to get his parents. Neil McTaggart and Mary Mitchell. Neil McTaggart was born 5 oct 1811 Campbeltown and died there 8 Dec 1879. That is how he connects to me. His parents were Charles McTaggart and Christian Stalker. Charles was born abt 1778. He died abt 1829. He had a second mar to Mary Hawthorn 1820 and their dau Christian was born 1829. It said to the "late" Charles McTaggart.
back to Neil McTaggart who md Mary Mithcell. He had a second mar to Jean McKinven 10 Dec 1863. Mary Mitchell died in 10 Sep 1861. She also was md earlier to James Hendry 5 Apr 1838.
I would like to find more out abt your desc.Samuel Alexander . I have him born Campbeltown 13 Dec 1874. Have names of other children also but do not have their exact birthdates.
I will be glad to share what I have with you. regards, Jen