Charles Smith McPherson, Aberlour and Banff, d. 1954

I am looking for descendents of Charles Smith McPherson, born and married (to Jane "Jeannie" Grant Sellar Grant) in Aberlour, and before 1910 moved to Banff where he became Rector of the Banff Academy. He died in 1954 at age around 90. I believe only one child survived: Hamish Grant McPherson, who I believe became a doctor and may have resided near or in Aberdeen. I have lost the trail on Hamish. Can anyone help?