Adoption research in Virginia from 1886-19115
Im interested in finding adoption records for my grandfather, who was adopted somewhere between 1885-1910. I believe he was called Robert Martin at birth and was adopted by the Dale family and possibly renamed William Elmer Dale. According to his passport, my grandfather was born July 1, 1886 in Betty Baker, Virginia. Betty Baker was a mining town (from my research) and it's in Carroll County, Virginia. I have my grandfather's passport and he mentions my great grandfather as someone that passed away and his name was Madison Dalton Dale, but i think he just put it in his passport to keep from being questioned. I researched and found Madison Dalton Martin. I found connected in my genetic DNA with many Martin family descendants, but have no real or close connections or documents to say he was adopted. Any way to research records?