Hi Elwyn, thanks very much for all this information. You have raised many things that I have wondered about for quite a while.
Firstly, I have long suspected that there were more children in this family. If Harvey's baptism record is missing, then so could those of some of his siblings. I would have thought that most families were large back then and the children we can see are quite spread out.
Re Wapping Lane, it is clearly in Derry city and I presume this was the case, even back then. The 'farmer' information does come from Harvey's death certificate, but it was also on his marriage certificate, when he was very much alive! I think the most likely explanation is that he liked the sound of that better than 'labourer' or something similar, or alternatively, as you suggest, that the family moved around and maybe worked on the land at some time other than when they lived in Wapping Lane. I noticed that in the Flax Growers List of 1796, there were Roulstons in Donaghmore and Taughboyne parishes in Donegal, which are very close to Derry. Do you think it's possible that the family could have worked on those areas before or after they lived in Wapping Lane? Either way, I presume John Roulston senior, would not have been a land owner. The 1796 list had Craig's all over the place, both in Derry and Donegal, but there were no Roulstons in Derry.
Re Harvey's birth date, that comes from his obituary. He established newspapers in Australia and this obituary was in the family paper, so it could be correct. However, it is not consistent with his age on his marriage certificate, or on the his eldest son's birth certificate, both of which would make him born around 1831.
I noticed on Roots Ireland that there was another Roulston family having children in the same timeframe who also attended the First Derry Presbyterian Church. There was a Mary, bap 1832 and an Archibald born in 1835, both with the father Oliver. You'd think the families would have known one another at least and, although we can't prove it, could be related in some way, such as John and Oliver being brothers or cousins. Also, quite by accident, I came across another Harvey Roulston in Lancashire, England, born in 1849, when searching on Ancestry. He was definitely not ours, but he had a son also called Harvey. I worked backwards on Ancestry and found this Harvey's father was Charles Roulston, born in Londonderry. Charles was also a Presbyterian and married Eliza Clark in Carsile Road Parish.
Now our Harvey also handed his name to his eldest son (my great grand father). The name lasted about four generations before it petered out. It seems a sufficiently unusual name to me that I suspect ( but once again can't prove) some connection, especially as it has handed down in two separate families. From the English 1861 census, Charles would have been born around 1825, so could possibly have been a cousin or brother of our Harvey. I wondered if Harvey could have once been a surname in the Roulston family, for example John Roulston's mother's maiden name. Is Harvey a surname or first name that appears much around Derry?
In summary, it looks like the the Roulston and Craig families were immigrants to Ireland from Scotland around the time of Plantation, but arrived in Derry after 1630. They were probably weavers or labourers, not land owners and may possibly have moved around the area. It is also likely that most of Harvey's generation left Ireland as young adults, ending up in the US, Australia and possibly England. We also know from Australian records that "the family were hardworking and painstaking Presbyterians and the tone of the Journal (their newspaper) was never tepid. It's editorials we're forthright, beautifully written and uncompromising. There is no doubt it must have annoyed many people......"
Again, thanks for your input.
Sally