I looked at the OPC site for Richard Sibly as witness to marriages.
There is one marriage in Bodmin, 1798, Jane Sibly otp to Henry Bazeley; one baptism 1799 St Issey.
Unfortunately, by 1841, Henry (c1766) was still living but was remarried, so no info about Jane available -- there is no birth to match in Cornwall.
But ... if our Richard was born c1784 he was a little young to witness a marriage in 1798.
(The RS who witnessed marriages in St Cleer would be my ancestor's brother.)
The other witness to that marriage was Nicholas Sibly.
He could be the one who was buried in Bodmin 1831, aged 66, possibly a brother of Jane. There's no matching baptism c1765 at the OPC site.
Nicholas seems also to have witnessed the marriages of two of Jane's daughters, Mary 1817 and Elizabeth 1830, in Bodmin.
Hm, hm. Nicholas and Richard are certainly Sibly names in Cornwall. In fact, I just ran across the death record of a Richard Sibly in 1933 in Illinois, born 1878 in England, son of "Micholus" of Cornwall. And he had a brother Joseph who died in 1898 in Michigan.
A widowed Nicholas Sibly of Bodmin married in Tywardreath in 1798:
http://www.cornwall-opc-database.org/search-database/more-info/?t=marriages&id=974382He could have been the NS who married Mary Jewel in Bodmin in 1761, a John Sibley witness:
http://www.cornwall-opc-database.org/search-database/more-info/?t=marriages&id=922636There are no baptisms to that 1761 marriage at the OPC site.
Just trying to see whether there are *any* Siblys in Cornwall we can connect Richard up with!
Okay, FS has Bodmin baptisms the OPC site doesn't have.
Parents Nicholas Sibly and Mary:
Susanna 1763
Elizabeth 1765
Nicholas 1768
Mary 1770
Richard 1772
Jenepher 1774
Nicholas 1784
Jenepher 1774 is undoubtedly Jane who married in 1798.
Nicholas may be the one who died in 1831 aged 66.
Could Richard 1772 be our Richard? ... That's really too much of a discrepancy with his age at death in 1833 (51).
Oh, aha aha -- what else FS has that the OPC site doesn't have:
Richard Sibly, baptised 02 Feb 1783, Bodmin, parents Joseph Sibly and Mary.
https://familysearch.org/pal:/MM9.1.1/J9SG-39PThat is him, our Richard, father of Adelina.
and in that batch
https://familysearch.org/search/record/results#count=20&query=+batch_number:P00275-1we also have, among others 1774-1791, Joseph Sibly, baptised 05 Nov 1779, parents Joseph Sibly and Mary:
https://familysearch.org/pal:/MM9.1.1/N511-78FNot the perfect match for the 1834 death aged 51, but not far off.
So it looks plausible that Richard and Joseph Sr were brothers, children of Joseph and Mary of Bodmin.
There is a 1773 marriage in Bodmin of Joseph Sibley/Sibly to Mary Nichols, one of the witnesses being Rebecca Libby.
And I would guess that the deaths of Joseph Sibley 1808 Lanivet, aged 56 (c1752), and perhaps Mary Sibley, 1797 Lanivet (no age), are that couple.
btw, there is some abject nonsense in submitted tree info at FS: that our Joseph Sr (father of the Joseph who emigrated) was born c1798 and married to a "Miss Libby" and died c1823, with son Joseph born 1824. We know that Joseph married Susanna Libby in 1802 ...