A footprint in the forest

I downloaded this picture from a now-vanished web page in the year 2000 and I am sorry to say I have no note of where it was taken or by whom. It purports to show a plaster cast of one of the Rendlesham Forest UFO landing marks, displayed at a UFO conference. We know that plaster casts were taken by Airman Penniston, and this is presumably one of those.

If anyone can supply me with more information as to the date, location and photographer I would be most grateful.

ian @ ianridpath.com