Hogwarts: An Incomplete and Unreliable Guide (Pottermore Presents, #3)

by J.K. Rowling

‘just as the human mind cannot comprehend time, so it cannot comprehend the damage that will ensue if we presume to tamper with its laws.’

Elderly witches and wizards still use the saying ‘I’ll take Cadogan’s pony’ to mean, ‘I’ll salvage the best I can from a tricky situation’.