Thanks to all the suggestions here, I received from the GRO birth records for twin Evan and William Jones, sons of Thomas Jones, railway laborer, and Mary Jones, formerly Jones, both born15 Jan 1867, which is consistent with date of birth in Evans' later records in naturalization and death records. Parents Thomas and Mary Jones were residing Blaensarum (sp?) Upper Lledrod, Tregaron, Cardiganshire at date of birth. Then I got the death record from GRO for William Jones, who died 10 days later, 25 Jan 1867, same parents, same address. Family letters said the father Thomas Jones died before they were born. I found on Findmypast, a parish register of burial in Parish of Caron, Caridgan, 3 Feb 1867 for Thomas Jones, age 40, same address of Blaensarman(sp?) Upper Lledrod. I believe this is good evidence for death and that this Thomas Jones is the correct father of Evan and William.
When I searched the same parish register burial pages for burial of William Jones, Thomas' son who died January 1867, I found none.
Would an infant not be buried from the parish of Upper Lledrod? Any suggestions why a burial record for William is not found in the parish records?
The parish register says burial for Thomas Jones was performed by J Hughes, Vicar. Any suggestions how to identify the church/chapel this Vicar belonged to or which cemetery Thomas Jones and son William Jones were laid to rest in?
I've tried searching maps of Upper Lledrod to find Blaensarum (sp?) but have not had luck yet. Any suggestions on a map which would identify roads?
Thanks for any help you can give.