Illustration by John Sadler www.johnsadlerillustration.com 

• IF ever there was a perfect example of “a picture is worth a thousand words” John Sadler’s addition, see above, to my jottings on the highline must be it, (Another green rail corridor? August 31).

I couldn’t believe how perfectly it captured the lighting and the whole experience of the journey.

PETER LYONS, NW1