he Golden Eagle Mystery (1942)

What happened to the stone egg in the carved claw? What was the meaning of the faded ink message, "I have put the nest-egg where it be?" Why should anyone steal and wreck the lobster boat named Patagonia? How did a carved cane get into the eagle's nest?
That young "G-man" with the odd name - Djuna - and his pal; Billy Reckless, piece together the clues to a 150-year-old mystery. Only quick thinking enables them to outsmart crooks following the same clues to a pot of - well, that would be giving away another exciting Ellery Queen Jr. mystery story.

Djuna and his dog Champ, go to Stony Harbour to spend what he thinks will be a quiet and uneventful holiday in a seaside village. But little does Djuna know what is in store! First he meets Billy Reckless and his "dog" Alberto. (And we are sure you can't fail to be amused by Alberto!) Then there is the mystery which enshrouds Djuna's Aunt Patty. Things begin to happen! Djuna has a grand time with his new-found friend, lobstering, sailing and exploring, till Aunt Patty's motor boat the Patagonia mysteriously disappears. Ellery Queen Junior has created a likeable character in Djuna the Junior Sleuth, not forgetting, of course, his black Scotty, Champ.

Pulp fiction writer Frank Belknap Long (1901-1944) has admitted writing at least two, unfortunately, without mentioning the titles. Mike Nevins, and in his wake half the internet, identified them as The Golden Eagle Mystery and The Green Turtle Mystery.

We do know Samuel (Duff) McCoy (1882-1964) had a contract with Lee/Dannay for each of the first eight juveniles from The Black Dog Mystery until The Blue Herring Mystery but he didn't actually write the stories ...

Whilst researching his new book on Ellery Queen, Jeffrey Marks found a first edition of The Red Chipmunk Mystery with the following inscription "Rhinebeck, N.Y. Aug. 31/48 For Karen Rose from the only real ghost who had anything to do with this book - Harold Montanye". He looked into this and found proof in correspondence between McCoy and Montanye that all final six books before 1954 beginning with The Green Turtle Mystery were written by Montanye.

Which throws a different light on the Frank Belknap Long admission to writing two or three in a letter to August Derleth. The identification of these two books was based on Nevins' identification. Long's two remaining volumes can only be the two remaining first volumes: The Black Dog Mystery and The Golden Eagle Mystery.
There was even talk about the existence of a third volume called The Mystery of the Golden Butterfly which was apparently never published. (Without reference to EQ jr this "elusive" volume is mentioned as Long's on the rear panel of The Horror from the Hills, 1963 and on the rear flap of The Rim of the Unknown, 1972). 

This second yarn in the junior series offered by famous Ellery Queen mystery-story team (under the signature, Ellery Queen, Jr.) is a first-rate mystery and exciting reading. Djuna with his Scottie, Champ, goes to spend the summer in a coast village.