This was to be his last speaking engagement, she said, and they would love some photographs to remember the night.
Mr Munro is perhaps typical of veterans of that era, with a marked capacity for understatement.
His squadron bombed the battleship Tirpitz; his only remark to that was "we achieved the objective".
What struck me about Mr Munro is that he clearly appreciated the technicalities of flying, the precision of it.
He liked the figures, the mathematics. It appeals to me too. I remember reading a story about sorting out British aircrew into what roles they were naturally disposed to.
The story went that if you could understand the principles of the International Date Line, you became a navigator.
Mr Munro was a pilot, but his description that evening of 617 squadron's most important mission, in his opinion - precision flying in the decoy operations the night before D-Day - and his diagrams - brought home to me his pride in doing a job very, very well, even if it is not blazing guns and glory.
Dambusters, he said, might have "captured the imaginations" in popular culture. Sir Peter Jackson is, after all, due to remake the movie. But Mr Munro's 56 other missions remind us professionals and experts who steadily achieve their objectives and pay attention to what they do, often without glory, carry the tide of war.
