... and yes, sure enough, each one has gone. That was a short life span :(
Logical analysis:
1. if members of the public have removed them opportunistically, GREAT!! So pleased that they've caught their eye. I hope these pieces of yarn graffiti turn up elsewhere sometime.
2. if local authorities have removed them, then how interesting! And fast work too!
OR ... if Rockingham doesn't like escaped knitting, other places might.