When I expressed amazement at his memory he was puzzled and claimed it was easy. A danger with someone like this is that it is very easy to be caught out in inconsistencies, and to have your own pronouncements quoted back at you. This is a hazard here with this forum, of course, and with written words in general.
If there was more than one headmaster with memories it would be, I understand, headmasters’.
I doubt whether many headmasters found individual canings as anything like as memorable as those they caned. The number of canings administered would likely be far greater than the number of canings received by a single individual, and less traumatic.