I can't remember everything that was in this thread, but I think I remember reading something about Robin Hoods grave being about 300 years old.
The problem with that, is that, (if I'm not mistaken) the Robin Hood Festival - May Day - is much older than 300 years.
There is a great story about the Robin Hood Festivals and such on the Edinburgh Mile website.http://www.edinburgh-royalmile.com/iframe_files/high-street.html
In 1561 the Tolbooth figures in one of those tulzies or rows so common in the Edinburgh of those days ; but in this particular instance we see a distinct foreshadowing of the Porteous mob of the eighteenth century, by the magistrates forbidding a " Robin Hood." This was the darllng May game of Scotland as well as England, and, under the pretence of frolic, gave an unusual degree of licence; but the Scottish Calvinistic clergy, with John Knox at their head, and backed by the authority of the magistrates of Edinburgh, who had of late been chosen exclusively from that party, found it impos-sible to control the rage of the populace when deprived of the privilege of having a Robin Hood, with the Abbot of Unreason and the Queen of the May. Thus it came to pass, that in May, 1561, when a man in Edinburgh was chosen as " Robin Hood and Lord of Inobedience," most probably because he was a frolicsome, witty, and popular fellow, and passed through the city with a great number of followers, noisily, and armed, with a banner displayed, to the Castle Hill, the magistrates caught one of his companions, " a cordiner's servant," named James Gillon, whom they condemned to be hanged on the 21st of July.