First appearance of <a href="https://en.wikipedia.org/wiki/Mary_Marvel" class="extiw" title="w:Mary Marvel">Mary Marvel</a> on the cover of <a href="//commons.wikimedia.org/wiki/Category:Captain_Marvel_and_his_cast" title="Category:Captain Marvel and his cast">Captain Marvel Adventures</a> number 18 (<a href="//commons.wikimedia.org/wiki/Category:Fawcett_Comics" title="Category:Fawcett Comics">Fawcett Comics</a>), December 1942), Artwork by <a href="https://en.wikipedia.org/wiki/Charles_Clarence_Beck" class="extiw" title="w:Charles Clarence Beck">Charles Clarence Beck</a>, one of a small number of painted covers produced for this series.
C.C. Beck
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