I am now going to make amends for my error with a correction that is of the same nature as the one that I thought I was bringing historical accuracy to bear on yesterday - only this time I AM sure about the facts. Again it involves a single digit discrepancy. I have seen somewhere on the internet LH saying that MD started in music aged 12; the correct age should be 11.
The king of nit-picking shall now fall into a humble silence.