Telford Chirps | Don’t stare too long: why our feral, polluted canals are so beguiling July 26, 2019 Liam Appleby …engineers, such as Thomas Telford and William Jessop, constructed… https://www.theguardian.com/cities/2019/jul/26/dont-stare-too-long-why-our-feral-polluted-canals-are-so-beguiling