Glad you got Jean Dreher's book. I recently heard of the "To Battle For God And The Right" book, and hope to locate one someday, but here in Canada it sometimes takes some time to find that kind of book here. I wasn't aware of the MacArthur connection - that is interesting! I assume that you have Bob Craig's book, "The Virginia Updikes-Updykes" as one of your three?
It was only a few months ago that the Schleswig-Holstein info was confirmed. See the notes for LOURIS JANSEN OPDYCK on my site. I have copes from the book the court recordsappear in. I believe that Louris' dad may have been working on the dykes at Schleswig, had his family there with him, and Louris happened to have been born there. They may have moved (back to?) Elburg later, as that seems to be where the vast majority of OPDYCK info was located by Leonard Eckstein Opdycke, during the research for the 1889 book. Another nesting area could have been Ijlst, Friesland, where Walle Mellis Oppedyk was living in 1889. Every time I look at the photos of him and his daughters I am AMAZED at the resemblance to MY family!
See the notes on my site also on the wife of LAWRENCE UPDIKE (b. abt. 1675). Some of us believe she was AGNIETJE POST (b. 1680), but no positive proof has surfaced yet, just circumstantial evidence. Do you subscribe to the Dutch Colonies List or the Opdyck Surname List at Rootsweb? That is where a lot of the new info and theories get let out of the bag. People on surname lists have knocked down a lot of major brick walls in my research.
Did you know that George OPDYKE was mayor of New York City during the Civil War? He was Charles Wilson Opdyke's dad. He is the mayor Opdyke mentioned in the recent movie "Gangs of New York". He also made a large contribution to Abe Lincoln's election campaign.