I have found the grave of my gt gt gt g.father and g.mother in Derriaghy COI churchyard. He died in 1873 and she died in 1879. He lived for 69 years making the year of his birth 1804. Also in the grave is Thomas Armour (son?) d.1874.
An Alexander Armour is mentioned in Griffith's Valuation, which could be him or another son, also Alexander.
Where can I see the original manuscripts?