For the leisurely return our intrepid planned (RogG) has come up with:
Mon 9/9 Grindelwald to Belfort 222km Grand Hotel Tue 10/9 Belfort to Troyes 272km Relais St Jean Wed 11/9 Troyes to Chamouille 172 km Hotel du Golf de l’Ailette Thu 12/9 Chamouille to Calais 233km