Hello,
First of all, I'm not sure this thread is still active, and that you will be checking any added posts. I tried posting to you through caithness.org where I found your original posting - and if anyone else linked to the same family reads this, I would welcome a reply. I came across a posting on caithness.org from January 2009 regarding your research into Lachlan Dallas and Agnes (Ann) Grieve.
I am not directly descended from Lachlan, but rather one of his brothers - James Dallas, who was married to Margaret MacPherson. James first moved north from Inverness to the Dornoch area, and then Golspie. He ran a successful saddlery business there (although there were problems with debt along the way), and then moved north to Wick in Caithness, Scotland.
I have managed to do a lot of research on James, and have also tracked Lachlan Dallas a little.
If you are still interested in learning more about the Dallas family, I would like to hear from you. My website can be found at
http://stevenmcgregor.cwahi.net/.
Sadly I haven't got round to adding all of the information I have found so far, but hopefully it will give you a taste of what I have managed to find so far.
For my part, although I have researched the Dallas family back to Lachlan and James' parents - James Dallas and Isabella Sinclair - I cannot be 100% sure of my connection.
My Great-Grandfather was William Dallas, and he was born as William Oman - the son of Williamina Oman who went on to marry Daniel "Donald" Dallas in 1877. Daniel, or Donald as I always refer to him (he used this name throughout his whole life), was the illegitemate son of Donald Dallas and Janet Nicolson. Donald Dallas senior was the son of James Dallas and Margaret MacPherson, and therefore a nephew to your Lachlan Dallas and Agnes Grieve.
William Dallas (Oman) may, or may not, be the true son of Donald and Williamina, or maybe only a step-son, but I have chosen to research the Dallas family in detail because this was my mother's surname, and her father before her, etc.
So if you are interested in corresponding, please feel free to get in touch.
Kind Regards, and best wishes for the upcomnig holiday season,
Steven McGregor (Thurso, Caithness, Scotland)