How interesting that you should mention "Rachel" I don't believe I am going to be any help to you but found this mention in the book THE DRUMRIGHT FAMILY TREE pg 38. This deals with the will of William Drumright Sr who made the will 21 May 1828 and died in October 1828 part of the inventory listing of this will found in Mecklenburg Virginia Will Book 11, 1826-1828
'The faithful slave "Rachel" who had been in the Drumright family since 1780 or before, was priced at $40.00. What a shame! The faithful old servant was sold by the children of William Drumright' this is written by Gracie Drumright Dowland and she obviously did not quote the will inventory directly.