As there isn't anything in
http://libindx.moray.gov.uk/mainmenu.asp there wasn't an easily legible headstone when the kirkyard was surveyed in 1978/9.
There isn't anything in the old Speyside MI books either.
The Moray Burial Grounds Reaserch Group may eventually find some hitherto unrecorded stones, but as far as I know they have not tackled Rothes yet.
The burial ground lair book doesn't go back as far as the 1820s.
The Rothes parish register contains lists of mortcloth fees paid in but I've extracted all the Leslies from that and have not (so far) been able to match them with certainty to George and Helen.