It’s been noted in ASoS that she was a skilled horsewoman (III: 193), and previously Ned noted that she might have carried a sword if Lord Rickard had allowed it (I: 186).
" You see how widely we differ, Sir James. I have made up my mind that I ought not to be a perfect horsewoman, and so I should never correspond to your pattern of a lady" .
'What is so unusual in you, ' she said, in a didactic tone justifiable in a horsewoman's address to a benighted walker, 'is that your knowledge of certain things should be combined with your ignorance of certain other things'.