A relevant MI:
Tongland- Allan McCoskery d Low Tarff Bridge 4 March 1841, aged 83. Father Samuel McCoskery d Keltonhill 20 March 1797, aged 77
Gadget
I'm researching Landsboroughs, but this may be of interest as well.
http://www.kirkyards.co.uk/tongland/tongland.asp?offset=20Inscription 147
In memory of Margaret Harris, spouse to Allan McCoskery, who died at Tarff Bridge, May 25th 1823, aged 61 years. Also the above Allan McCoskery who died at Low Tarff Bridge, March 4th 1841 aged 83. Also John Landsborough, their son-in-law, who died at New Dairy, 23rd Feb. 1864, aged 89 years. Also Margaret McCoskery, their daughter and wife of the above who died at Dunjop [Dunlop?], 22nd Dec. 1867 aged 79 years.
Reverse: Also his father Samuel McCoskery, who died at Keltonhill, March 20th 1797, aged 77 years. Also his mother Ann Brydson, who died August the 10th 1804, aged 80 years.
Pat