Thank you so much for your very full and clear response to my enquiry, which is embarrassing for me as I have since discovered that I have, as it were, been barking up the wrong family tree.This was a real blow, because they were such an intriguing bunch, e.g. I'd love to know the relationship between Silvester Mylchreest and his 3rd wife Catherine Cain, als Mylchreest (m. German. 1816).
BTW, James Henry's wife was Elizabeth Blackburn, b Ballasalla IOM 1828, to John Blackburn and Jane Taylor.
The problem was my great-grandfather William Cain, who is revealed to the world for the very first time at his marriage to Hannah Hurley at Manchester Cathedral in 1875. My William was born in the same part of the world, and around the same time as William Caesar and, in the absence of any other possibilities on record, I assumed that he was mine. I then sent for the marriage cert, only to find that my William's father was not James Henry, but Edward Cain, sawyer. I had been informed that everyone born after 1837 had to have a birth cert. How wrong!
William and Edward managed to avoid not only birth registration, but 1861 & 1871 census records. I do, however, feel I've made progress, as the only Edward Cain that comes close to fitting married Mary Ann Marsh at St. Mary's Manchester on Sept 18, 1849. Edward was born in 1821 Braddan IOM, eldest child of John Cain (b. Marown 1799) and Mary Anne Boyne, b. Liverpool 1801). His brother Thomas was born IOM 1823 before the family moved to England & had 8 more children. In 1850, Edward & Mary Ann had a daughter, named after her mother, who died age 5 months with no birth registered. The couple were together at 1 Bennett's Buildings, Hulme, Manchester on 1851 census.
If this Edward is my 2nd great grandfather then, thanks to Francis Coakley's A Manx Notebook, I appear to have the line back to William Cain's chr in 1728, though I do need to check and send for wills etc.
Many thanks to you, VOGEL. for all your hard work.I am still interested in the line you have researched as, even though they aren't mine, I became very attached to them and their lives, often revealed through their wills, my favourite being that of Joney Jane Cain, als Quiggin in 1779.