John, If he worked at the Powder Mill you most certainly have to go to the Soda House. Ask for whatever records they have on that explosion and also the Brandywine Manufactures Sunday School Records. If he was Catholic you will want to look in the cemetery at St. Joseph's on the Brandywine Church which is near the museum. It has been divided by the road so look in the churchyard and the cemetery by the museum. When you get there you will see what I mean. Other churches are Mt. Salem which is Methodist it has a cemetery. Greenhill Presb. off of Rt. 52 and Christ Church which is back by the Soda house. I don't think Christ Church has a cemetery. You will find them very helpful if you just tell them what your looking for and the dates. I would think they could give you specific directions to these churches and other places from that location, it might be easier for you to find them that way. The great thing about Delaware is its size. You can cover a lot of ground in a short while and the area in which you will be looking is beautiful. You might want to include a tour of the museum. I hope this helps and goodluck Sharon