In 1943 Earl Mac Pherson created
his first 'Artist's Sketch Pad' for Brown & Bigelow, in which a central,
finished figure is augmented by preliminary-style side sketches. In 1951
MacPherson developed Polio and his assistant T.
N. Thompson took over the Artist's Sketchbook calendars, successfully
reproducing MacPhersons style. KO Munson, Fritz
Willis, Freeman Elliot and Ted
Withers have also worked within the genre.
One of the added advantages of the format is the ability
to feature additional nudity and risque notations on the borders since
it is 'only' a sketch and therefore somehow more 'artistic'.