I saw that the Tour is starting at her birthplace and there is to be a tribute to her, so I went to Wikipedia. Wow! Poked around a little more and came to this photo of her out training. (Scroll down twice.) Dressed to go to work as a secretary, riding a fix gear with one (Mafac) brake, fenders, rear rack and big English saddlebag. And riding shoes.
The secretary you would never want to challenge in a 100 mile TT!