Hi...How funny to come across this inquiry! My dad is Jim Twaddell , brothers, Steven and William. They indeed lived in Madison in 1942.. My father and William now live in Providence R.I.. My grandfather, William Freeman Twaddell was a linguest at Brown University, however, once taught in Madison. My grandmather Helen Johnson Twaddell surely was the one who sent the postcard...Would love to see it! Hope life finds you well. Please feel to contact anytime.