National Comics #66 (1948)

When Carnie and his circus troupe arrive at Montville, they find themselves trapped on a mysterious estate after a series of strange road signs and a hidden electrified fence lead them astray. The enigmatic owner, a man who claims to hate circuses, reveals a decades-old grudge tied to a lost love and a tragic past, forcing the group to confront his bitter history during an unexpected dinner.

When a mysterious fighter known as Rocky Granite dominates the boxing world with inhuman durability, Granny Gumshoe uncovers a shocking truth: the champion is a living statue crafted by sculptor Anatole Chipper. With a clever plan and a new fighter made of stone, Granny sets out to expose the truth behind the deadly match.

When Captain Barham is called to investigate a renewed threat from the infamous Black Hand, Policewoman Sally O'Neil takes charge after being left in command during his absence. She quickly finds herself trapped in a deadly scheme orchestrated by the cunning Mr. Fix, who has lured both her and the captain into a gas-filled basement with a bomb and a twisted game of survival.

In "Mr. Miacca," Quicksilver keeps watch from a clock tower when he spots a peculiar, portly man leaping between rooftops with an uncanny, bouncy gait—his costume's secret revealed to be a reservoir of gas that powers his strange, spring-like movements.