Curious---Tad left or right handed?

[Eva Elisabeth]

In Germany, until the 1980s, left-handed children were forced by the teachers to use the right hand instead. (My parents, thanks God, protested, so I was left left-handed.) Was it the same in the US, especially in the 19the century?

If not, and Tad was indeed left-handed and allowed to be in the US, his Frankfurt school would have opposed this. Whether Mary would have agreed to such or not, I tend to think she would have mentioned the issue in a letter.