Originally credited to Al Carreno. The eyes with high arched upper lid and some short lines below the outer corners, and sometimes hands with lines between fingers that don't go all the way down, page 2, 4 and 5. All good signs of Anderson. He had many Nyoka, Mr. Scarlet and also Lance O'Casey stories. Compare faces with his credited Red Gaucho in Master Comics #10.
story continues in next issue.
Ricca can be spotted by his rounded faces with squinting eyes and a small dent under the middle of the chin. Later he had a bit more open eyes.