Yes they are from Russell, KS. I grew up in Great Bend just a few miles from there. Charles Warwick had a son, Myrl, which is my Grandfather, Dean, Lee, Lloyd, and daughters Ethel, May and Olive.
I can't seem to find the info about where I came up with Wilson as the father, but I'm looking at the 1910 census and it says that his mother and father were both born in England. So it sound like you have it right. I don't know where I came up with Wilson from.
As for the sibling of Charles and Joseph, I have Henry, Alfred, Cora (some places say Adora), Edwin Joseph, and Chester.
I would love to have a copy of the obituary if you wouldn't mind emailing it or mailing it to me.
I don't have a lot of information at the moment. My grandfather passed away in 1996 and I never had an opportunity to ask him about his family and my grandmother doesn't know much other than my grandfather's parents. But I will be more than happy to provide you with anything I have.