 Raymond 's work on X @-@ 9 is said to particularly reach for " the feel of the best pulp interior art of the time , " a style that would evolve with his own so @-@ called " great flourishes " and " later blossom to full effect in Flash Gordon and Jungle Jim " . " Under his pen , " writes Maurice Horn , his Sunday pages " became world famous ( especially Flash Gordon ) . " However , historian and critic R.C. Harvey argues that " despite Raymond 's great talent as an illustrator , his deployment of the comic @-@ strip medium ( on X @-@ 9 ) was not very impressive . " Harvey feels that Raymond 's work suffers in comparison to Milton Caniff 's contemporaneous work , with Raymond 's failings as a visual storyteller less noticeable on a weekly Sunday strip , where the space afforded played to his skills as an illustrator . 
