"as Robert C. Harvey has pointed out"
Cartoons of the Roaring Twenties
Public DomainCartoons of the Roaring Twenties - Credit: Fantagraphics
Robert C. Harvey (b. 1937) is an author, critic and cartoonist. He has written a number of books on the history of cartoons, with special focus on the history of the comic strip.  He is also a freelance cartoonist. 

The Art of the Comic Book image
Public DomainThe Art of the Comic Book image - Credit: RC Harvey
He began writing about cartoons in 1973, starting with a column in The Menomonee Falls Gazette.  By the early 1980s, his columns were appearing in The Comics Journal and Comics Buyer’s Guide.  In the 1990s, he collated and edited Fantagraphics Books’ Cartoons of the Roaring Twenties. In 1994, he published The Art of the Funnies, followed by The Art of the Comic Book in 1996. He also served as an associate editor for the journal Inks: Cartoon and Comic Art Studies.