Meanwhile back at the drawing board…
I’ve been asked to re-do a drawing of the Professor and here he is.
They say one always draws oneself, or elements of oneself.In this particular case this chap looks more like my Dad ( 93 next birthday, so not quite so energetic as this chap! But still with all marbles functioning)
So here’s hoping for a reaction!
Paul Davies Cartoons & Stuff 
He looks a bit like a magician! Not in his dress but in his face and body language ‘see what I can do!’
I’ll take your word for it!