Just Off the Somme, What the Hell Is Hogwarts?

Traveling back to England in the early 20th century, Langdon had to be involuntarily involved in the war that was known as "the end of all wars." But the first battle, the Battle of the Somme, which was a mountain of corpses and a sea of ​​blood, made Langdensheng feel a sense of absurd redemption: "This is addition and subtraction, this is multiplication and division, this is Goldbach's conjecture." After stumbling all the way, he finally returned home. With the military pay and the pensions of his comrades in hand, Langdon decided to rely on his foresight to take advantage of the opportunity in this era and let his family live a good life, until the owl appeared in front of his door with a letter in its mouth... Dear Mr. Chris: We are pleased to inform you that you have been admitted to Hogwarts School of Witchcraft and Wizardry. Attached is a list of required books and equipment. The semester is scheduled to begin on September 1st. We will be waiting for your owl to bring your reply before July 31st. Freshmen are not allowed to bring their own broomsticks. Yours faithfully, Phineas Nigellus Black Principal