Link to google maps showing a memorial to someone who died along further east from the 3 Horseshoes
Article by John Torrance about this bit of road
available as a doc with photo of memorial
Dr Thomas Gilbery Smith in 1904 died "fell dead from his bicycle" thunder and lightening followed.
There's an illustration of this memorial in my AA book of the road from many years ago.
And finally I've tracked it down thanks to googe maps!