Afterburner:
Nieuwhof: There are many indications that people along the entire coast from Germanyu to Flanders maintained contacts and paid each other visits in their dugout boats.
De Langen: ......to get a wife.
Nieuwhof: ....to get a wife, or simply to visit other people. For example the sluices of similar type that I describe in my paper, that are found in Vlaardingen as well as in coastal Lower Saxony: these are evidence that these people were in contact and exchanged information and technology.