80 Cours Gambetta nº 27
If you are sending a handwritten letter and envelope, there should be no problem with the symbol that looks like degrees º. For those who want to use a keyboard, the code for that symbol is Alt+0176 in Windows (and I think it has to be entered on a numeric keypad) and option+0 (zero) on a Mac.
We will try to update again soon, perhaps with pictures included. In the meantime, we are so pleased that he is enjoying his mission experience thoroughly and doing very well...