Ok. Dyslexia would have been an evolutionary advantage in times past and probably still is in some non-literacy-dependent cultures. To be able to think outside of the box, which dyslexics can often do, would be just the kind of person you'd want in charge in many situations. Did you know Winston Churchill was dyslexic? I don't go with the idea that all dyslexics are geniuses by the way, just that dyslexia is a particular manifestation of "normal" which confers particular cognitive advantages, creativity often being one of them. Just the same really as some of us being better at maths and others at languages. We would never dream of describing those of us who struggle with one of these as being "defective". Dyslexics are however disadvantaged in a society which equates being literate with being intelligent. Your son just has a range of talents that are currently undervalued by society.
In terms of the Bates family, they could well have added to the dyslexic gene pool through their marriage partners. Hope you manage to find your thread of the family.
Christine.
Christine.
Christine.
Christine.