Dear Brian, Having gone back through my notes from Feb 2012 the JR & JC headstone at Logie, Montrose looks to come from John Read/Reid & JC. We have three children for John Reid:- Margaret b. 23 April 1721, William b. 20 May 1725, Elizabeth b. 9 March 1736 but no R Reid as yet. Margaret Reid married Wm Niddrie I. We have two children for them:- Robert (no details) and Jean b 24 Jun 1750. Robert Niddrie married Jean Milne. We have three children for them:- William Niddrie II b 1759, Elizabeth b. 1763, Clementine b 1766 but we reckon on at least one more for them. William Niddrie II married Jean Lakie. They had two daughters:- May b 3 Feb 1803, Jean b 7 Feb 1805. May Niddrie married Alex Alexander 23 May 1835. I need to stress test this line and get more out of the OPR to give it a bit more body but it looks about right as it stands. Elizabeth Niddrie (1763 - 1838) is on the 2nd headstone in the line. It looks as if she married John Forbes (1766-1839). Issac MacKenzie (1849) at Logie Works and Elizabeth Forbes d 2 Feb 1849 aged 46 (his wife) is also on the 2nd stone. Clementine Niddery may have been on this stone if the notes made by "George Alexander around 1935" or so are correct but time and weather have damaged that part. I will ask his grand-daughter if she has anything more on that bit of the story. As you can see the Alex Alexander family history story has been going on for a long, long time but we may have at long last the makings of a decode of the 1st headstone in 2014.
A John Read/Reid born around 1690 - 1700 looks very possible but it all needs a bit more work which I MUST DO on the IGI and OPR. It looks more like a Niddrie/Niddery connection and not a Alex Alexander or a Mary Carnegie one --- sorry about that!
Best wishes, nw_whiskers.