The IGP website I mentioned is back online after their server upgrade, no sign of a burial for Samuel at the moment but worth checking back as they update the photos and transcripts as volunteers carry out further surveys. (I've add a couple of collections over the last while, mostly counties Dublin and Wicklow).
I've also checked for possible civil deaths of Samuel's father on IrishGenealogy, without much luck - no matching deaths in Monaghan district, just three between 1864 and 1901 in adjacent districts - Clones, Cootehill and Castleblayney, all with ages that could fit with being Samuel's father. Images are not available online for any of these yet, but should be added during the net update.. I'll keep an eye put for any possible matches...
Regarding the records for the Church of Ireland parishes I mentioned - historic records for two of the parishes are noted as lost, not great coverage at the moment for the others online at the moment, just some partial records as transcripts on RootsIreland. RCBL = Representative Church Body Library, Co. Dublin, PRONI = Public Records Office of Northern Ireland, Belfast
Monaghan town - records in local custody b.m.d/b 1802
Aghabog - lost *
Clones (part Co. Fermanagh) RCBL b.m. d/b 1682 also PRONI *
Clontibret - earlier records lost
Donagh - local custody b. m. d/b 1796*
Drumsnat - RCBL b 1796, m 1797, d/b 1796 *
Errigal Trough - local custody b. 1809 m. 1803 d/b 1802
Killeevan - RCBL b. m. d/b 1811 *
Kilmore (Clogher Diocese) - local custody, b.m.d/b 1796
Tedavnet/Tydavney - local custody, b.m.d/b 1802 *
Tehallan/Tyhallon - local custody, b.m.d/b 1806 *
Tullycorbet - original records lost, some transcripts available PRONI/RCBL
* some coverage RootsIreland
The RCB Library, which hold most of the historic Church of Ireland records for the Republic of Ireland, are working on record transcription project, which aims to transcribe and index the Church of Ireland records. I suspect this will take quite some time, and probably start with the records they hold, but hopefully will eventually start work on records held by the parishes..