I thought that they might be a selection of his less wonderful drawings, and maybe I thought it wasn't worth bothering over just ten pictures.
Anyway, I went yesterday when we were up in Belfast and had the kids over to see a Dinosaur exhibition that was also on at the Museum.
I was so thrilled to find that this extraordinary sketch of a man on a rearing horse is one of the ten drawings in the show.
For me, it was worth going just to see this picture.
This sketch was in a fantastic book about Leonardo that I had out on almost permanent loan from my school's library, and it always stood out for me as one of Leonardo's most sublime creations.
I stood and looked at this little drawing for a very long and happy moment.
So if you are in or near Belfast do go and visit the exhibition. It's on until the 27th of August.
The rest of the Museum is wonderful too.