Hi JDT,
I have nothing on your grandfather at all, I have Thomsons who were married to the Tait family who ran Temple Farm or at least worked there, as far as I know they were Tenant Farmers leasing Farms from the Dundas Estate.
It would seem that your Thomsons did work at Temple farm according to 1861 Census and lived there so George's father must have moved down towards the village, they lived in what was called the Temple Farm Hind's House.
The Family are : James Thomson aged 39 and born around 1822 at Ancrum, Roxburgh he is down as a Farm Servant, his wife is Elisabeth born 1818 at Peebles, Mary Thomson daughter born 1847 at Temple, Hannah Thomson daughter born 1849 at Temple, Elisabeth daughter born 1854 at Temple then your grandfather George.
As George's father was a Ploughman he would be much sought after if he was a good one, in this case I think he would nave been, at times though Ploughmen were down as Farm Servants and their trade was not properly revealed.
Here is what I have on your family the Thomson burials also a photo of the Headstone.:
On the stone it reads :
Thomas Thomson died October 1852 aged 1 years 6 months,
William Thomson died February 1861 aged 2 years 6 months,
Mary Thomson died 19th August 1864 aged 18 years. John Gunn
who died 6th March 1878 aged 32 years. John T Thomson died 24th
December 1878 aged 34 years. James Thomson died 30th May 1883
aged 34 years. Hannah Thomson or Gunn died 31st October 1885
aged 36 years. Elizabeth Tait or Thomson died 29th January 1890
aged 72 years. James Thomson late of Temple Farm died 15th
August 1894 aged 73 years.
Sorry about the condition of the stone, as you see it is covered by Lichen which is against the Law to remove.
Cheers.
Archie.