One Panel #842: How Can We Tell Who Drew This?

From The Marksman: "Here Lies the Marksman" by Fred Guardineer, Smash Comics #42 (April 1943)

It's always interesting to see how the experts have identified artists (if not writers) on old, unsigned Golden Age strips. In this case, the Comic Book Database makes this claim: "Identical art to Guardineer's many other signed stories in this feature. A bit sleepy faces with many short, thin vertical ink lines on the cheeks, and ears with a question mark inside."

Here's one of those ears:

But to be fair, if Guardineer was usually drawing and signing the strip in other issues, it was probably him here, too.