It’s Dick's Secretary, Jane, here. Dick has asked me to advise that at the present time he’s climbing in Switzerland and can’t get access to the internet. He does actually have other interests! When he’s in contact again, he will comment on this thread.
Dick points out that he asked ATC whether an IFR clearance would be available and was told it would be. It appears that even though it was severe clear day only by filing IFR and paying the enroute charges would he be accepted.