I have no idea where Shardlow or Preston Brook are, except they were 54 miles and 38 miles respectively from this mile post. Shardlow is South, Preston Brook is North. There is another one of these on the road where I live. Why? because a branch of the canal used to run from the town of Stoke-upon-Trent by the Spode factory, alongside London Road and think it went through Newcastle-under-Lyme. In fact a man called Timothy Trow jumped into the canal to save a child from drowning, but got into difficulties and drowned. There is a stone memorial about it on London Road.
History is strange and interesting. I must find out about Shardlow and Preston Brook and what parts they played in history.