The Leonardo exhibition was extraordinary. You could get close enough to his sketches to see his left-handed pen strokes and backwards writing.

He had a bit of the same trouble doing hands as Walt Disney, it seems. Fortunately Leonardo did not resolve this by giving his figures three fingers on each hand and white gloves. It would have spoiled the look of Woman with Ermine (stoat in its winter coat).

The cartoon was there... and, to trot out the old joke, it still didn’t make me laugh.

The two versions of The Virgin of the Rocks, one from the National Galley the other from the Louvre, in Paris, were brought together in one room. Leonardo’s Last Supper wasn’t there. It was painted on to a wall in a convent in Milan and has badly deteriorated over the centuries. But a painting of the original is on show and you can see the very long toes of the apostles.

As we left the exhibition my husband turned to me and shook his head. “It was very good... but...”

“But what?”

“There was nothing about Titanic, was there? And we didn’t see that painting he did of Kate Winslet in the cabin.”