Hi Alan I havn't been researching this line for quite a long time My connection is through Helen Reid
and Robert Bruce Buchan Helen was my fathers sister if you would like a fuller history of your 
GGG Grandparents our local family history society at 
www.buchanroots.co.uk have  done quite a lot
of research into them .Most of the Buchans in this area have bye names to differentiate one Buchan
from another .your  line is the (doodies)  During our local Scottish Week your ancesters were featured
on one of the displays, so if you live locally it can still be seen at Peterhead if you contact the family
history society
               regards
                           John