National Comics #71 (1949)

In this charming 1949 slice of childhood humor, Lassie finds herself babysitting the curious Ulysses, taking him to the zoo where the big cats and elephants fail to capture his imagination. But when a toy mechanical mouse rolls into view, it’s the tiny, clattering gadget that steals his heart—proving that sometimes the smallest things spark the biggest wonder.

Sally O’Neil, a policewoman, is called to the Stone estate after Flavian Stone’s sudden death, where she finds a house full of suspicious relatives and a coroner who arrived too quickly. With no weapon and alibis for everyone, the murder remains unsolved—until a phone call from the estate’s secretary reveals a shocking new development, and Sally realizes the key to the case lies in a shortcut and a seemingly innocent umbrella.

In "null," a clever thief targets a painting from an artist involved in early color TV experiments, exploiting the technology's quirks to pull off a high-stakes heist. When the artist notices the colors don't match the original, his sharp eye leads to the thief’s undoing—before the law can catch up, the truth reveals itself in a flash of color.