Happy Earth Day!
You all know, of course, that Hogwarts was founded over a thousand years ago - the precise date is uncertain - by the four greatest witches and wizards of the age. They built this castle together, far from prying Muggle eyes, for it was an age when magic was feared by common people, and witches and wizards suffered much persecution.
40 years into the future: Bradley and Colin have drifted apart. They’ve barely seen each other in years. Bradley’s phone suddenly rings - he looks down at the caller - Colin. He’s busy at that moment, so he hangs up.