In Judy Taylor’s book Sketches for friends, 2002 are a series of Edward Ardizzone’s illustrated letters. Some I have illustrated below. From reading the Tim series of books, Edward Ardizzone seemed like a kind person and his letters have a joy to them as well with all the comic illustrations.
It was an age when the postal service would run almost continuously and you could send a letter in the morning and know it would get there in the evening. You could keep in contact throughout the day.