Thanks for your replies, but I think the jury is still out :-(
Often you see age given in death notices as 70 or 54 or whatever years old, and I assume that this would refer to their actual age before their next birthday after their death.
But often you find "in their hundredth [or eighty-fifth or whatever] year" and I don't know if this person had already celebrated his 100th birthday or not.
Chinese celebrate the day of the birth of a child as their first birthday; we only celebrate our 1st birthday when the first year has passed. After the first birthday a child is in its second year, right?
So I still don't know if "to attain my 21st year" is the same as having one's 21st birthday.
In my research it is pretty vital because the author got married on 1st February 1838, and it would be great to know how long he knew his bride before he married. If he was still hundreds of miles away at his 21st birthday in 1837 and did not know his future bride, it looks like it was a shotgun wedding sort of affair :-)
Maria
PS. Sandymc, I can relate to your story, same humiliation happened to me