i live in Bourges at 8 minutes "place de la barre".
i dunno if i can help you if you don't have any other informations about "maddy".
"maddy" being a current nickmane for "madeleine" , it's gonna be difficult to find a girl just with her name but we can cross fingers :-)
do you know what kind of industrialist her father was ???
do you have some dates (month, year) to give me to help ??
if i can help or if you need pics of "place de la barre", which is one of the older (more old ? i dunno how to say it..) places on Bourges, tell me..
see u soon maybe,