Yep, riohog, some of the earliest writings of Lurcher production mention the 'legendary' Smithfield collie, the supposed 'ultimate' in Lurcher production but the more I think about it, though I don't doubt Smithfields were the choice of some, by their work they would have passed through many a Shire, where their qualities were well known but just because 'they' were written about and lets face it, Lurchers in print was a pretty rare thing back then, who knows how widespred that cross was?
I'll bet that the Smithfield type didn't suit all, just as today, we all have different opinions of what