No, not a joke, nor a new virus, just a request for information on the subject which is relevant to a report that I am preparing.
There are three points which I hope someone of you can help me with.
1. What is the earliest date (approximately) that can be assigned to such features?
2. Is the sunken wall allways located on the outer edge of the ditch (the furthest from the dwelling) ?
3. From the little I know about them, I believe they are usually curvilinear. Is it at all common for some to have straight lines?
May I offer my thanks in advance for any help you can provide me with and point out the fact that as I reside in Germany I have no access to a good library, at least within a reasonable distance.