Another report from one of our lurking members:

For those interested in ancient plant food remains, and the digestion, a
very good survey of work from Palaeolithic to date:

Gordon Hillman:  Plant foods in Ancient Diet: the Archaeological Role
of Palaeofaeces in General and Lindow Mans's Gut Contents in
Particular  pp 99-116. In <Lindow Man, the Body in Bog> British Museum
Publications 1986 ISBN 0-7141-1386-7 (Gordon Hillman of the Institute of
Archaeology .UCL London)

also related papers in the same book:

Timothy G Holden: Preliminary Report on the Detailed Analyses of the
Macroscopic Remains from the Gut of Lindow Man: pp 116-126

Robert G Scaife: Pollen in Human Palaeofaeces; and the Preliminary
Investigation of the Stomach and Gut Contents of Lindow Man.: pp
126-136

Don Robins  Keith Sales Duro Oduwole Tim Holden Gordon Hillman
Postscript: Last Minute Results from ESR Spectroscopy Concerning the
Cooking of Lindow Man's Last Meal.: pp 140-143

< thanks to Staffan Lindberg for his note in the Paleodiet digest. I
really think he should read the <Time Walkers> book. Things are moving
relatively fast in paleoanthropology especially re Homo Sapiens
( I mean they are not moving at glacial speeds the way they did for
years :-)  )  Clive Gamble has worked on the paleolithic development  of
hominids with Chris Stringer of the Natural History Museum  London. He
is located at Southampton University. It seems that many sites where it
was presumed that man had hunted  animals  and butchered them  are now
seen as places where the poor things were instead eaten by  carnivorous
animals along with the other prey. This means that a lot of work on
paleolithic diet will have to be rethought if this is  true.>