Thanks for all this information but I have ALL of that already. I'm more interested in finding anything about Mark Roberts and his father Peter Roberts

If your family had Catholic roots in the late 1700's thenm this might explain a few things.

Roman Catholic records for Perthir , nr Rockfield Monmouth

http://www.cefnpennar.com/perthir/perthir_catholic.htm

LDS gives

MARK ROBERTS
------------------------------------
Event(s):
Birth: 31 DEC 1806
Christening: 01 JAN 1807 Perthyr-Rc, Perthyr, Monmouth, England

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Parents:
Father: PETER ROBERTS
Mother: MARY JONES
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Messages:
Extracted birth or christening record for locality listed in the record.
The source records are usually arranged chronologically by the birth or christening date.
----------------------------------------------------
Source Information:
Batch No.: Dates: Source Call No.: Type: Printout Call No.: Type:
P015001 1711 - 1712 942 B4C V.1 Book 0472548 Film
Sheet: 00

Year: 1859
Month: Nov
Day: 30
Surname: ROBERTS
Forenames: Mark
Residence: Crossways
Age_at_death: 52
Officiating_Minister: John Hawksley Curate
Event: Burial
Cause_of_death:
Memoranda:
Notes:
Register_Reference: P227 IN 1/27
Page_No: 111
Parish_Chapel: Newland