Last moments-serendipity!
We drove with Valerie to show her, on a quick visit-- Little Missenden and on entering the rear of the Red Lion gardens we spotted what looked like Louis' hat! Sure enough it had an Australian store tag inside, so we claimed it from the bar!
We must have left it there on Sunday.
We enjoyed an hour's walk through an ancient bridleway, worn into a tunnel by the history of horses' hooves pounding the ancient way.