In which year did Chesterton write the 'I am' (what's wrong with the world) letter?

 https://christianity.stackexchange.com/questions/61695/in-which-year-did-chesterton-write-the-i-am-whats-wrong-with-the-world-lett

https://catholicherald.co.uk/continuing-the-hunt-for-a-fabled-gk-chesterton-quote/

Text of letter: 

https://www.jordanmposs.com/blog/2019/2/27/whats-wrong-chesterton