I searched the Fordoun Parish Register quite a few years ago, as one branch of my family comes from there. This was shortly before the Parish Registers were added to Scotland's People, so my research was done from microfilm at an LDS Family History Centre. There was, as far as I recall, no Mortcloth Register. There was, however, a burial index, giving the date of burial, name, address (farm or village name only), marriage status, cause of death and age. As an example, one of the entries I noted reads: 1824, February 26th; Helen Cruickshank; South Blairs; Married; Consumption; 57. The entries I noted down covered the years 1806 to 1834. I cannot recall if there were any earlier of later entries - certainly there were not many years covered compared to the main register.