Below are some examples of his illustration work, most from the 1920s. Some are competently done, and appeared in some of the better magazines. A few others are of lesser quality.
Matteron signed this as an Army lieutenant. I don't think this poster is well-done artistically and persuasively.
Matteson did a number of Western romance story illustrations. This is not his best: note the poor anatomy at the man's neck and shoulder.
Another Cowboy romance. Essentially the same costume as seen above. The girl is nicely depicted.
From the same story as the preceding image? Costumes are nearly the same. Or did Matteson simply repeat the same sort of clothing again and again when called to do Western love stories?
This is comparable to 1920s illustrations by better-known artists such as Dean Cornwell.
Another competent work.
For reasons of printing economy in those days, many illustrations were created and printed in duotone.
The lady is poorly drawn: her head is too large for her body.