Per Braddan Burial Register
Alice Christian Banks body was sent to "Conchan"
Both she and Mathias lived in Douglas.
His body was likewise sent to "Conchan"

I don't know, but I would guess she was buried with her husband.
There is no inscription.
I don't have a burial register for Onchan--maybe that would help to clarify??
Mathias is in Onchan Old Yard P8

Let me know what you find out