I love that he's a writer! So far from the political ideal but something I think Beau would really respect. While Beau is known for being steadfast, logical, and stern by most regards I think that Kit would have avoided most of the brunt of it when he left for overseas. Beau would have been so consumed in work (the thing he entirely devoted himself to in order to avoid being consumed by guilt and depression), that he probably wouldn't have been the greatest at keeping in touch over that time. Most of his information about Kit would have probably been relayed from their mother or other siblings. Growing up, I imagine they tussled a lot if Kit had trouble holding his tongue because Beau would have always felt the need to put him in his place. He has a real complex about protecting his siblings (ironically) and knowing what's "best" for them. Otherwise I'm sure these days, once he moved back from France, they would have been on good terms!