Hello Sue,
it is Peter Corkill Senior who is buried on, 4 October 1822 and it is His Memorial Inscription,

Peter Corkill Junior, His Will made 22nd day of January 1823, His Burial 29 January 1823

you said from M.I.
/ also ELINOR CORKILL wife of the above who died May 1st 1865 aged 87 years.

Closest burial is Ellen CORKILL, aged 87, Ballaugh, buried Maughold Apr 24 1865.

this Ellen Corkill is buried on the 24 April

whereas Ellinor Corkill "died" on the 1st May is this possible ???

Averil