This is all a bit confusing

Onchan Parish Burial Register
John Kelly Mount Rule Douglas age 42 years buried 9 Sep 1882
Elizabeth Kelly Douglas age 38 buried 22 Jul 1841

Onchan Monumental Inscriptions
Index
Onchan OLD YARD Grave #P x 32
KELLY
Anne age 19 died 14 Jan 1852 Burial Reg Anna Douglas age 19 buried 17 Jan 1852
Elizabeth age 38 died 20 Jul 1841 bur as above
Elizabeth age 24 died 7 Sep 1858 buried 13 Sep 1858 from Douglas
Isabella age 21 died 2 Jun 1857 bur 6 Jun 1857 from Douglas
John age 24 died 21 Jan 1855 bur 24 Jan 1855 from Douglas
John age 71 died 17 Mar 1872 bur 20 Mar 1872 from Christian Road Douglas
Margaret age 1 wk died 30 Aug 1840 not in Burial Reg
Margaret Elizabeth age 22 died 27 Feb 1864 bur 1 Mar 1864 fromm Douglas

JOHN 1882 is NOT listed in the M.I. Index for Onchan but is listed in Bur Reg above

However
Onchan Old Yard
Grave #32 has this MI
Sacred to the memory of MARGARET wife of DAVID CALLISTER who died 1st December 1849 aged 70 years

Donna