If your Case Briggs was married to Laura ( ), then his father was Thomas Briggs. His Brother was Job Briggs. They had an Anthracite coal mine and "Breaker" in what is now the west end of Scranton PA. Apparently they sold out about 1840 to a corporation. If he is of our family this is a real hoot. My father loved hunting for agates at Acme Sand and Gravel south of Muscatine, IA. Case could be my fathers' great great uncle if this is all true.