How long does it take to rot?

Look at the sheet called 'What Rots? 'It shows you the sort of material that might have been found in one of the 'middens' around Cerdic's village. When you have identified what everything is, see if you can put the material in the right group on this sheet.

What does this information actually tell us about the Saxons and about Worcestershire? For a start, do you know what a midden is?