I had a bit of extra time last night and started reading Gleanings of Virginia History. An historical and genealogical collection by William Fletcher Boogher. It is available on archive.net. His book is particularly easy to read and navigate and I found myself wanting to spend the entire weekend reading and using his material....it starts with the very earliest settling of Virginia and then goes on to the French and Indian War and then the next section is about men being paid to protect the western frontiers....all of these subjects of great interest to me because of my Farrar family, and my Castle and Morrison family, and even one small section was about early settlers in what is now Stafford and Prince William Counties....
However I am in the midst of preparing for my DAR meeting next weekend....so I decided to make notes and safe until later in the month.
Page 23 is the start of the money spent on protecting the frontier in 1756. And it is names by county. Valentine Castle is named on page 36. He is said to be from Augusta County. This year would have been when Augusta County was everything west of the Shenandoah Valley. So if Valentine is a part of our Castle family group he could have been living almost anywhere..
The most helpful thing is that people are paid in groups which means you can get a feeling for if this is really your own ancestor by the neighbors and friends....for example, Andrew Hays and Robert Campbell are paid with a fairly large group on page 47
Page 113 begins Boogher's information about the Scotch-Irish of Augusta County.
https://archive.org/details/gleaningsvirgin00booggoog/page/n126/mode/2up
Then there is some information about the revolutionary war and some genealogies of a few families of Virginia....There IS an index.
