Got a train ticket with all good properties (exchangeable, refundable, expensive (oops, this one is not so good), etc) so I can take any train Saturday. I booked to one which should make me to arrive around 17h00 at Porte Maillot. BTW the weather should be good (up to 18 celsius in the afternoon) Saturday. Regards Francis Dupont <fdupont at isc.org>