Presumably you have something that suggested Dundrum area after release from prison in 1900 as if he returned there visiting family? So I looked around
Two entries in the 1911 census, suggested more thought
1 Property number 2 in Murlough Lower (Dundrum, Down), a Samuel Clarke grandson to the Quinn family is living with them, the head of the family isn’t listed I think. Where had this Samuel Clarke aged 14 come from? His age in 1901 would have ~4. He should appear in the irish 1901 census.
2. Property number 2 in Ballybannon (Dundrum, Down) William Clarke b Belfast has moved here, with his Armagh born wife Elizabeth from This family appeared in 1911 census with his three year old daughter. They have lost 3 children in their marriage and were living in Belfast where the surviving child was born. They have been married 6 years so the marriage is about ~1905. Could this William Clarke have a been a relative eg a brother or older son aged 17 in 1901. He should appear in the irish 1901 census.
Do you know who your Samuel married or lived with as a partner? Where would he buried? If he was a catholic , he might have had a funeral service in Sacred Heart Catholic Church, Dundrum Parochial House 33 Main St, Dundrum BT33 0LU which has no graveyard; burials in St. Joseph's Ballykinler or Aughlisnafin; UHF has baptisms 1854-1900 & marriages 1855-1900,
or he might have records in Immaculate Conception of Blessed Virgin Mary Catholic Church in Aughlisnafin townland which has a Graveyard attached, graveyard inscriptions UHF Vol 9; email me Ros Davies for a gravestone look-up all this church information from her website
http://freepages.genealogy.rootsweb.ancestry.com/~rosdaviesAlso from her Ros Davies surname list abstracted for Kilmegan civil parish and not for commercial use. I don’t know the townlands so its useful to have.
http://freepages.genealogy.rootsweb.ancestry.com/~rosdavies/MAPS/KilmeganTownlands.htm The parish is about six miles wide at most. In her surname list she has at least eight Clark/Clarke in Kilmegan
Looking again at
http://www.askaboutireland.ie/griffith-valuation/ around 1859 were homesteads
Clarke Ellen Ballygawley Aghadowey Derry
Clarke James Bovagh Aghadowey Derry
Clarke John Cornamuclagh Aghadowey Derry
Clarke John Cullyramer Aghadowey Derry
Clarke Sarah Cullycapple Aghadowey Derry
Clarke William Gortin Mayoghill Aghadowey Derry
Hoping you can see a way forward
JimG