Hi USA Lass,
I feel that the Christening of your John Grant, may never be found.
I have found a Marriage of Peter Grant to Ann McPherson 19/2/1819 Cabrach Banff or Ab......
There are 2 Christenings that I could find. James and Elizabeth.
NB......Cabrach is 7.8 miles from Mortlach.. so this is very close..
When I searched for the family in 1841Census, I found Peter Grant, Blacksmith. and guess where he lived ..........Cabrach...
So I feel this is your Peter, minus, his wife.....sadly. and also minus John. ( John may be already at work on a farm.)
It seems this Peter has died by, 1851c. So it all fits.
So I would hire the OPR's for Cabrach, and see what else you can learn....
1841 Census
Cabrach-Aberdeenshire
Cabrach-Banffshire
Address: Alluie
GRANT Peter M 45 Blacksmith Aberdeenshire (Originally: Banffshire )
GRANT Elizabeth F 20 Aberdeenshire (Originally: Banffshire )
GRANT Jean F 11 Aberdeenshire (Originally: Banffshire ) Regards,
joanne