Glen - I had a look on Findmypast but couldn't discover anything - but thanks anyway.
Boosh, thanks for the kind offer. My Lincs connections are Blackb(o)urns.
William Blackburn was baptised 1752. I don't yet have a burial date for him but it would likely have been within your timescale (1801-58). His last child was baptised in 1794 and the family lived in Boothby Graffoe.
There is also a slight chance that Thomas Barsley may have lived into the 19th century - he would also have been in Boothby Graffoe or possible Digby.
Likewise, William Blackburn's father, Richard might just have made it into that century (I find it difficult to find burial dates in Lincs as you may have gathered!). Richard Blackburn lived in Navenby.
I'd be really grateful if you could check to see if any of the above are in your Index.
Thanks,
Jill