Have a look at this one, while it's up - http://www.themodernantiquarian.com/post/55756 . And please don't cheek someone with forty years of working stone - even if they do come from Lancashire (everyone's fallible).

As was said above about stonelifter's wall stone - when you ain't seen them you cannot be sure. You can have an opinion, I've no problem with that, but you can't say for sure ... or have you studied Irish quarryman's chisel marks of the 19th Century and the elongated cup-marks of the Wicklow Mountain monuments in detail? Many of those are a long way from roads or walls and there are plenty of more accessible stones nearer to the roads. Some of them are now accepted as the real deal by archaeos*.

A few of them may be chisel marks, but nowhere near half of them.

* I had to stop myself going ... ner-ner-na-ner-ner! there :-)