After clambering up the gantry on my revisit to the timber yard, for our next explore of the day Kubix_UK and I decided to head underground to Harford Hills Chalk Mine. The experience was about 25% anxiety and 75% enjoyment I would say – I did my best not to think of Tom and Becky lost in Injun Joe’s cave‚Ķ Here is a short background to the mines, taken from this excellent site, which includes a fairly comprehensive survey of…