I found following link and the associated talk fascinating and in keeping with the rest of the series.
http://www.bbc.co.uk/ahistoryoftheworld/objects/aU8eDjPFTQy35wPaAhSLGg I hope that those outside the UK are able to listen Regards Andrew Pettit --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
