He has written in The Times today how it all originated in a game of rounders when Ms Thomson ate the backside off him for taking the easy option of tapping for first base.
She had a gritty determination about her; a competitive nature.
On a Friday afternoon, she’d always give us an hour of playing rounders. Once, I was batting and I tapped the ball, then did the bare minimum to get to first base.
“’Ferguson!’ she roared. ‘You tap that ball again and I will have you.’ So I battered the next ball out of sight and ran like hell. She was good like that. She got you performing, you know? Yes, I think there’s part of me that comes from her. That determination and that sense of drive. That ‘never give in’ attitude she had about all her students.
Judging by his story it seems that Elizabeth Thomson was actually the inventor of the hair dryer treatment and her legacy has been carried on by Fergie.
Sir Alex goes on to reveal that he has kept the belt she used to hit him on the hand with, having left it to Ferguson in her will years later. Ferguson was also the leader of a gang of Thomson's pupils who decided to gatecrash her wedding in 1953.
You can read his full piece here.