Below an extract from talking scots.com I found for High Parish Johnstone - will try and visit but earliest would be end of next week.
Talking Scots
(I phoned the minister (a Mrs. McCool) to make an appointment, but she said she "didn't know where the Lair Books were". Alas, she didn't seem too inclined to find out where they could be, so i just dropped it. I've been told that the previous minister, a Rev Randolph Scott, knew where they were and was more than willing to help.
The records are, i believe, the "Extracts from Lair Book of Johnstone Parish Church". They're not indexed, written mostly chronologically, are rather fragile, and also a bit difficult to read.
I knew it wasn't an ernormous graveyard, so i eventually just went to the church with my cameras on the off-chance i could find the one i was looking for - but soon saw that there was very little hope. Whilst there are a good number of stones still upright (and tablets on the walls) still quite legible, very, very many MIs were on their backs. This meant that the grass was growing over most of them, and because they are lying flat are being more quickly eroded by the elements. I lifted the grass off many, and wondered why a lot of them had been scored and chipped at some time - 3 hours later i got the answer.
From the front i heard the sound of lawnmowers, intermingled with bangs & crunching noises - they were certainly cutting the grass, but in the process were taking chunks out of gravestones too! Those sit-on machines were going right over everything that was near ground level.
Got chatting to the men after one of them found a camera case i'd dropped. I thanked him, and felt i should explain what i was doing - so i did, and the expression of relief on his face was a picture. They'd had me down as a church spy checking up on their work with a camera! They then took a rather long break - but it was a scorcher, and they did look like they needed a rest.
I knew it was the possibility that there never ever was a gravestone - a lot of folk were buried in "common ground" in many cemeteries with nothing to mark their resting place. After 7 hours i still hadn't found the headstone, but at least i did get some pics of a lovely church and its grounds on a lovely sunny day)
The above is the extract
Liz