1. Department of Archaeology, Lower Saxony State Office for Cultural Heritage, Hannover 30175, Germany
2. Department of Archaeology, University of Reading, Earley, Reading RG6 6AX, United Kingdom
3. Department of Wood Biology and Wood Products, Georg-August University Göttingen, Gottingen 37077, Germany
4. Archaeological Conservation Unit, Lower Saxony State Office for Cultural Heritage, Hannover 30175, Germany
5. Department of Prehistoric Archaeology, Georg-August University Göttingen, Gottingen 37073, Germany