The Littles in Scotland

I have learned the following from a researcher in Scotland:

"In the OPR for Westerkirk there is only ONE Thomas Little born around that time. 'April 25th, 1742, Thomas, son to John Little in Carlesgill" Billholm is about 3 miles from Carlesgill, these were workers or tenant farmers on the Duke of Buccleugh's estates so it is quite possible that the family moved. Rentals and jobs were often on short term contracts. The Westerkirk M. I. s have the grave of Thomas Little, Tenant in Carlesgill died 1720 aged 75, Margaret Graham, his wife, died 1739 aged 76. This line of Littles appear to be connected to the Lairds of Meikledale. I know it is supposition but in the absence of any other evidence I would suggest that John Little of Carlesgill must be a grandson to the Thomas (died 1720). The absence of later family on the stone suggests that a move took place, and if you take into account the agricultural system practiced at that time, John may well have moved to Billholm."