I’ll try to help my best “ a troubled mind caused me to walk abroad” i think he means while his mind is troubled or he has a lot on his mind he is pacing as one would tend to do when stressed
I think it would be "According to some scholars, when poorly educated people read, wrote, and spoke, they corrupted the English language." and "There was no authority on the"correct" way to use or spell words."
I agree with you, I thought I was the only one lol