I just had a thought. If anybody needs help with addresses or has questions about the Clyde River bank area I am pretty familiar with it had could help. I've spent alot of time in Argyll and am familiar with the local history and what I don't know I learning as fast as I can.
Duncan is a big Sinclair name is Argyllshire. I have a few. I'll let you know Karen if I come across any that might be interesting for you. It is in my family line out of Inveraray and Glenorchy.
As a "heads up" to anyone - the Kilchrenan & Dalavich parish line and the Glenorchy & Inishail line changed a few times. If you are looking around Loch Awe - keep it in mind.