Holy Moley! My new cap's gone! I don't see it anywhere! And I can't afford to buy another one! Gosh, that was an unlucky break for me! 
Captain Marvel, Jr. #51 is an issue of the series Captain Marvel, Jr. (Volume 1) with a cover date of July, 1947.
Synopsis for Capt. Marvel, Jr.: "Capt. Marvel, Jr. and The Island Riddle"
Freddy Freeman is peddling the Morning Press, reporting that a huge tidal wave is going to hit the coast, but they evacuated the only towns on that seaside of the coast, so it should be fine. Due to the 1946 Aleutian Earthquake that hit Hawaii, the government at large is now a lot more worried about the threat of really big waves. He and a reader are disturbed to find they can feel the wave even as far inland as they are and they can hear it too. Freddy calls CAPTAIN MARVEL and looks around for it as Captain Marvel, Jr. He soon spots the hundred foot high wave and a fishing boat caught up on it, so he pushes them out of the wave and off to safety. He soon finds the wave has crashed through town. The water starts to recede and he finds two scientists in a boat, investigating a “new island” which they claim has caused the huge tidal wave. As they get closer, their motorboat tips over from volcanic gasses and Junior flies them to the island to be the first people to walk on it. However, very confusingly, Junior finds a bare footprint on the ground too despite the island only having existed for an hour. He hears the scientists screaming in a cave and finds them being attacked by a giant green octopus, so he wrenches them free and punches it in the head until it leaves and abandons attacking them. He tries to tell the men about the footprint when he returns to the cave, but they suddenly see a capsizing ship nearby that was trying to run the SS Vogel out to the New Island as an excursion. Junior boards and helps the ship right itself, telling the skipper that he needs to wait a day until the island settles first, rather than endanger people he wants money from. The skipper realizes his fault and leaves. However, the scientists start shouting again, because they're being abducted by Fish-Men! They reveal that this used to be an underwater village of Fish-Men that blame the surface-dwellers for uprooting them into an island and decide to drown them. More puzzling than ever, when Junior fights them, he finds they don't have feet, but are actually mermen. However, they soon find that the footprint wasn't made recently: it's fossilized from after some million years when the island must have sank. Now that it's risen again, they discovered the footprints of ancient men! Later, Freddy is happy to find that nobody died in the tidal wave and people can now visit the new island from 1,000,000 years ago.
Appearing in Capt. Marvel, Jr.: "Capt. Marvel, Jr. and The Island Riddle"
Featured Characters:
Supporting Characters:
- Two Unnamed Scientists
Antagonists:
- Murderous Mermen
Other Characters:
Locations:
- Earth-S
- New York City
- The Coast
- A New Island
Items:
Vehicles:
- The SS Vogel
Synopsis for Capt. Marvel, Jr.: "Capt. Marvel, Jr. and The Revolt at the Zoo!"
Freddy Freeman notices that the City Zoo is getting in a new animal, a gorilla named Manfred. Manfred manages to slip past the truck he's in and walk out, but everyone assumes that he's a killer and Freddy calls CAPTAIN MARVEL to punch the ape in the gut and then uppercut him. The dazed gorilla is led back to his cage. Soon after, he decides that he doesn't like living in a cage and demands that animals have equal rights. The monkeys are convinced enough to see what he has to offer, which is feigning illness so he can attack a zookeeper and steal his keys, starting to release all the others. Freddy spots a bunch of escaped zoo animals and calls CAPTAIN MARVEL to return to being Captain Marvel, Jr. and lightly ushers them into their cages, though Manfred uses this opportunity to free a zebra, a monkey and a lion. Junior decides to ask the monkeys by just using the Wisdom of Solomon to learn the language of the monkeys, but finds out that Manfred didn't really tell them what his plan was. Manfred decides to elect himself leader of the animals, since he says he's the strongest and the Lion quickly finds that his promises of liberty were hollow when Manfred whips him by the tail into the ground, ordering the zebra and monkey steal for him as slaves. Later, the Monkey steals some bananas and Junior spots him. Junior invades a taxidermy store to dress up like an ape and fight Manfred, returning the animals back to the zoo where they're safe and won't be attacked, even when Junior offers to take them back to their native jungles instead. The animals decide they can now live in their own form of liberty and did so… democratically, pleasing everyone except for Manfred.
Appearing in Capt. Marvel, Jr.: "Capt. Marvel, Jr. and The Revolt at the Zoo!"
Featured Characters:
Supporting Characters:
Antagonists:
- Manfred the Gorilla
Other Characters:
- A Lion
- A Zebra
- A Monkey
- Other Monkeys
Locations:
- Earth-S
- New York City
- The City Zoo
- New York City
Items:
- A Monkey Costume
Vehicles:
- A Gorilla Delivery Truck
Synopsis for Capt. Marvel, Jr.: "Capt. Marvel, Jr. and the Magic Cap"
Freddy Freeman loses a cap to the wind and decides he'll just have to get a new one. Meanwhile, in the Gnome World, King J. Erky II decides that his life has become too easy and carefree due to him having a Magic Wishing Cap that lets him just receive all the nectar and ambrosia he can neck down. Thus, he accidentally wishes someone else had the Magic Wishing Cap and it flies on the wind to Freddy! With his jaunty neon green cap on, Freddy wishes that something exciting would happen, which leads to several minor car crashes. Freddy quickly calls CAPTAIN MARVEL to stop the rampaging gangsters that caused the crash, but they swerve into a toy store. Back in Gnome World, the other gnomes find that King Erky no longer has his unstoppable weapon and decide that they'll seize control instead, since he's a boring and irritating leader. He tries to remember a magic charm that will take him to his Magic Wishing Cap, managing to get through HYSTO, WENDUL, MYSTO GYNNY, and even WILLEEB! Thus, King Erky arrives in the Big Apple and snatches the Magic Washing Cap from Junior, who thinks it's being stolen. He tries to stop him, but King Erky wishes him to do 1,000 somersaults, which he does immediately. The goons big up their money and run off while Junior is doing somersaults, but he manages to just kick them while somersaulting. Luckily, he manages to knock King Erky over while doing so, knocking the Cap off his head and stepping on his hand, having finished his 1,000 somersaults faster. King Erky offers him wishes if he returns his Cap to him and wishes the toy store back to normal, but when Junior starts to ask too many questions, he wishes everyone forgot about the Magic Cap and about him too… so they do! Freddy (and therefore Captain Marvel, Jr. also) forget about the Magic Wishing Cap entirely and Freddy finds the gangsters who robbed the Ace Fur Store were caught by Junior.
Appearing in Capt. Marvel, Jr.: "Capt. Marvel, Jr. and the Magic Cap"
Featured Characters:
Supporting Characters:
Antagonists:
- King J. Erky II
- Fur Thieves
Other Characters:
Locations:
- Earth-S
- The Gnome World
Items:
- King Erky's Magic Wishing Cap
Vehicles:
- The Fur Thieves' Car
Synopsis for Capt. Marvel, Jr.: "The Man Who Feared Midnight!"
A rich man is woken at midnight by a nightmare as his butler rushes in. The rich Mr. Carl Ramsey decides to go see a psychiatrist about this and he points out there's no seeming cause for him to have insomnia or to be especially terrified at midnight. He offers he do something fun at midnight so he won't feel so bad when it comes up. However, Carl Ramsey leads a second life… as a burglar! While breaking into the expensive library of Otis Sprague, they topple over the books, alerting Mr. Sprague and Freddy Freeman, who is outside in an Evening Star delivery truck calls CAPTAIN MARVEL to look into things as Captain Marvel, Jr. Ramsey starts a small fire in a wastepaper basket and tries to shoot at them, only for Junior to deflect them and stop the fire by catching it on a curtain and whipping it into the night sky. Ramsey manages to escape, but midnight strikes and he has another breakdown. Back at the Sprague Estate, Junior finds a card from Ramsey's psychiatrist, Dr. Nelson Ames. Dr. Ames tells him that he has an appointment coming with Carl Ramsey, but he's a man of known reputation. Junior asks what he's seeing him for and Dr. Ames tells him about his patient's crippling midnight phobia. Junior doesn't regard the problem as serious enough and presumes it was a joke and hangs out in front of Ramsey's house. Ramsey decides to steal the Vandever Clock Collection (including his newest Venetian Baroque) to distract himself from it being 11:30pm. However, when he shows up at Herman Vandever's house and tries to steal his amazing clocks, Junior flies in to stop him. Ramsey throws some clocks to keep him from catching him and escapes out to a large Blacksmith Hammering an Anvil Clock that goes off at midnight, knocking him out of the clock tower and to his death. Ramsey died at exactly the stroke of midnight.
Appearing in Capt. Marvel, Jr.: "The Man Who Feared Midnight!"
Featured Characters:
Supporting Characters:
- Dr. Nelson Ames
Antagonists:
- Carl Ramsey (Dies)
Other Characters:
- Otis Sprague
- Herman Vandever
- Carl Ramsey's Butler
Locations:
- Earth-S
- New York City
- Sprague's House
- Vandever's House
- New York City
Items:
- A Giant Hammering Anvil Clock Tower
Vehicles:
Trivia
- Despite the cover, the murderous Mermen are actually more gray than green and don't have as prominent dorsal fins.
See Also