Hi Brenda I have similar info to you. According to the 1881 census there was: a Thomas born in Torthorwald, aged 30, a gardener, married to Georgina, gardener's wife, born in Tinwald. Census place is Tinwald. Possible children are: Isabella,8,scholar, born Mouswald Jessie,7,scholar, born Tinwald Mary,2 , born,Tinwald. This jessie fits in with yours, as does the mother's name. However, I have Thomas's parents down as: John Mundell(church carpenter) & Janet Smith Brown (not Jessie), married : 22 Aug 1845 in Mouswald. There were several siblings for Thomas, some are only possibles.
OPR reports a John born 24/9/1820 to Joseph and Elisabeth Moor. I'm not sure if this is the same John. I tentatively go further back from here but haven't confirmed John's connection to my branches. If you have any further info abt the Mundells mentioned (or further back) I would love to share, Thanks Sue