In the Gutter at Bollington

Walking along Bollington's main street with my head bowed against the wind and rain I noticed something curious about the kerbstones.  They, or at least some of them, are numbered!

Here's a "3"

and a rather clearer "4"

There were also a number of ones and two's, but nothing higher as far as I could see. There was also this splendid specimen:

 

I've seen mason's marks on many an old stone building and even on a few canal locks, but never before on something as prosaic as a kerbstone. This mason obviously had pride in his work.