I've had to extend the start date for my Dutch Ships paper back to 1600

Thanks to Carl Stapel's research efforts, I've extended the start date for my Dutch Ships paper back to 1600. I already have completion dates for ships prior to 1620 and now have data points prior to 1620, as well. With what is already known from the Staets and what has been published, we will be able to fill in much more about the Dutch navy prior to 1639. Taking the time to enter more of what is known from the Staets and from published sources now seems like a more worthwhile occupation.