Yes, I get that and I'm sure you're absolutely correct. I still think the strip has a similar appearance to those Billy Bunter strips where Bunter is a cartoony figure drawn by one artist and the other characters are drawn as "real" by someone else. The Turpin strip seems like that with the central character being the "real " one. And that's why I wondered if someone else had done the other characters.
I have to add that I don't find his work "old-fashioned" but then I'm cracking on a bit and a lot of modern comic artwork leaves me cold.
Thanks again for the info. and insight. All help gratefully received.