The odds of fine weather - 100 to 1 against. There's a book I need to read yet, by Clive Ruggles, and I believe he presents the statistical results from the surveys of quite a few stone rows. It's the intentions of the builders that I'm interested in and even with statistical proof you still have to persuade someone to accept it. I don't have twenty five years and I don't realistically expect to write about it in detail.

I've found better rows in Northumberland actually - http://www.themodernantiquarian.com/post/20455 - I guess after nearly three decades of aligning stones in straight planes then straight planes of stones that have been arranged call to me - and I've found nine or ten stone rows. Alexander Thom generated enough statistics to keep anyone going for a long time indeed.