In the Camus graveyard, there is a Samuel, died 1872 aged 82, "died at Camus", buried with an Isabella, died 1882 aged 76, a Samuel Jnr, died 1883 aged 39 and a Sarah, died 1887 aged 18.
The 1828 TAB gives the following Grays in the TAB in Camus:
Samuel Gray 4.3.21
David Gray Jnr 4.1.30
Joseph Gray 10.3.12
David Gray Snr 13.1.3
James Gray 6.0.19
Grays in 1831 Census in Macosquin
F/n S/n T'land Hse # M F
Samuel Gray Camus 15 1 1
Susan Gray Camus 16 1 2
James Gray Camus 17 1 4
David Gray Camus 21 1 2
Joseph Gray Camus 23 3 4
James Gray Camus 38 2 4
Joseph Gray Glenhall 3 5 3
Joseph Gray Glenlary 17 4 4
James Gray Glenlary 24 5 4
John Gray B'laggin 13 2 2
Might be the Samual mentioned as giving info to the 1835 OS Memoirs, Macosquin.
The circa 1855 Griffiths Valuation for Macosquin shows:
Joseph Grey Camus
Joseph Grey Camus
Samuel Grey Camus
Samuel Grey Camus
James Gray Cullyvenney
James Gray Ballintaggart
James Grey Coole Glebe
This Samuel is NOT either of these Samuel Grays in the GV as I know that they are both the same man and that he is the son of a Joseph Gray of Camus. So, this man is NOT in the GV. So, this man must have moved away, perhaps to Coleraine, but was brought back to Camus to be nursed prior to death. I think that is the implication of "Died at Camus" on his stone. I know now that his son died in Coleraine.