Hi InLiverpool,
Apologies for the delay in response but, I've been out all day.
From an Announcement in The Londonderry Sentinel and The Derry Journal of 13 Mar and 18 Mar 1841, I located the marriage announcement of Mr Thomas Pinkerton of Balloughry to Miss Isabella Macky, daughter of John Macky of Molenan.
They were married on 9 Mar 1841.
I then located a record for their daughter Mary Ann Pinkerton who was born on 7 Dec 1841 and had a Presbyterian baptism in The First Derry Parish of Londonderry on 23 Dec 1841
I found no death or further announcements for Thomas Pinkerton, no further births or even a 2nd marriage for Isabella.
However, we know that by 1847, Isabella was having children with Edward McGrath.
I then located an RC baptism for MARGARET Pinkerton, daughter of Thomas and Isabella dated 11 Mar 1852 which is annotated as Convert and the sponsor was Margaret McGrath.
I can only assume that Margaret was younger than Mary Ann but not an infant in 1852 but I wonder if this was in advance of her first communion? Therefore aged around 6-7yrs.
(The sponsor may or may not have been my teenage GG Grandmother.)
May Ann Pinkerton, daughter of Thomas and Isabella was baptised as RC on 1 Oct 1854 and also annotated as Convert. She would have been 12yrs old at this time
The sponsor was Sarah Boyle.
Mary Ann Pinkerton married Thomas Hegarty on 9 May 1864.
It was at least a couple of years after this marriage that her mother Isabella and stepfather Edward McGrath moved to Liverpool as their youngest Irish born child was born in Mar 1865
I never located any information on daughter Margaret Pinkerton beyond her baptism of 1852
Contrary to copied information from tree to tree, the 1918 death in Derry refers to a Mrs Margaret Pinkerton Maiden name Fairman who was the widow of John Pinkerton and they both were from Donegal.
Be warned not copy anything that you cannot verify.
As you know, Edward and Isabella had a daughter named Margaret who was born in 1859 so I assume the first Margaret ( Pinkerton) died between 1852 and 1859
Margaret McGrath was baptised in Derry on 12 Jun 1859 and the sponsors were John Farland and MARY ANN PINKERTON ( now aged 18yrs)
Some years ago, I passed all this information to my DNA match, which is how the information is now showing on public trees.
I've always been certain that Edward was the younger brother of my GGG grandfather.
This ancestor spent a few years in Glasgow and appears on the 1841 census.
I know they returned to Derry between 1843 and 1851.
I am quite sure that the Edward McGrath in his household at 1841 was his younger brother and the same Edward who married Isabella.
Many years ago, I visited the grave of my GGG grandfather and the records office at the cemetery confirmed his parent's names and his grave stone states he came from Molenan.
His parents were called Peter and Margaret, therefore, based on the names of Edward's children, I am certain that they were Edward's parents too.