No pics, I'm afraid, but I have a pretty good memory of a piece of wall FOI long before the act came into being.
On a stretch of red brick wall on the Heathfield Rd side of the Villa Cross pub was the legend "Is J Brookes the whispering grass?" for as long as I can remember passing it on the 46 (and 90 and 91?) bus as a child for the period 1970 - 1980.
At the time I remember wondering what a whispering grass was, then what he'd grassed. It was only many years later that I wondered if JB had met one of the horrible fates that sometimes befalls a grass.