4 continue north east of the A75 - lots of nice roads in that area. Or you could miss out 3 and 4 and head north via CastresTulle etc to Chateauroux then the Loire. Stay in Logis de France or other small town bhotels/b. b..../b up to Treignac, bPeyrat/b-Le-Chateau (Resistance Museum) and Oradour-Sur-Glane (WWII Martyred Villiage) above Limoges, then cut over to La Rochelle over the bridge to St Nazaire (big commando raid here on the Submarine Pens and the largest dry dock), ...