The best source for info on early VA rifles is Rifles of Colonial America by George Shumway, the Journal of Historical Armsmaking Technology Vol 2. published by the NMLRA, and Gunsmiths of Virginia and Longrifles of Virginia by Dr. James Whisker. There are also articles in past Muzzle Blasts by Wallace Gusler. If you have specific questions, then you should contact Wallace Gusler. He has 40 years worth of data sheets and photos of Virginia, Kentucky, and Tennessee longrifles. He has been working on a book, but I have given up on it ever being published. If I need specific info on a rifle, I just ask him. If you have a particular interest, let me know, and I will direct you to a resource.