User blog comment:AustinDR/Death in Season 3..../@comment-32173189-20170810223048

I might be reading to much into it, but with the number of times Mr. Grouse has appeared lately and with "11 Louds a Leapin'" shedding some light on his family and his situation regarding them it might setting it up to be him. If that is the case at some point in that episode the Loud family might given a letter or a relative of Mr. Grouse might tell them despite his grumpy nature and sometimes being annoyed by their shenanigans he did enjoy having them as his neighbors and being part of some of their exploits (such as acting as Lynn Sr. to get him a new job).