I don't have any C16th illustrations of these but below is a illustration, from 1879 showing Charcoal makers in Epping Forest, on the right hand side of the picture you can see some rudimentary windbreaks made of poles interwoven and filled with branches. These seem to held by poles bracing them against the wind.

So we need to retrieve a number of hazel lengths this winter to make into the frames and then in the summer we can use bracken to fill the gaps.
As it is a slow day at work today I have even made a little model, from coffee stirrers, of what the finished article might look like:
