Actually the way I go through Museums, blades would have been more practical. I'm not one to memorize visual art. I glance and what catches my eye gets my attention. I was definitely in the minority here though. You would be amazed at how many people memorize each painting as if they were going to lock it in their minds eye and take it with them.
Memory is such a fragile thing though.
It escapes us so easily. I'd rather have pictures. After a politically correct period of time in the National Gallery we changed footwear again and headed of to the Capitol. By the way there is no blading allowed on the grounds of the Capitol. Something to do with national security or something.