The field of archaeology exists to understand human development and history through our material remains. At times the archaeologist resembles the role of a detective, piecing together the story, the motive, the purpose behind why a particular piece of pottery or stone or bone or whatever it may be was found where it was, when it was, how it was etc. I recall once participating in an excavation in the remote island of Islay in western Scotland, ploughing my way through layer after layer of thick, sludgy, slimy silt in freezing temperatures with my knee deep in mud, increasingly torrential rainfall and rapidly losing the will to live, only to seemingly find nothing. It turned out the post-excavation process of flotation, sieving and sorting had unearthed a microscopic charred seed remain which, when radiocarbon dated, brought back the date of this particular site to over 1000 years than had previously been estimated, consequently causing a re-evaluation of the entire site. The clues are often subtle, but nonetheless they remain evident.