11 of The Life and Times of Scrooge McDuck. Also, according to Rosa, Blackheart Beagle semi-retired in 1947, following a failed attempt at robbing Scrooge's Money Bin. In The Life and Times of Scrooge McDuck, Scrooge first met The Beagle Boys in his Mississippi riverboat days, circa 1880. Those Beagle Boys included Blackheart Beagle and his three sons. Scrooge first met the modern third-generation Beagle Boys during Christmas 1947, which was when he first met his three grandnephews, along with his nephew Donald Duck for the second time. Since then, the Beagle Boys have been a constant threat to Scrooge's Money Bin. The third generation of the Beagle Boys, like their fathers, were never given any personal names by Carl Barks but was instead referred to by their prison numbers, which starts with "176-" and ends on a permutation of the numbers 1, 6, and 7, which allows six different combinations. This tradition was first established in Barks' The Menehune Mystery (Uncle Scrooge No. 4, December 1953), while the Beagle Boys in previous stories, and some of them in The Menehune Mystery, instead had their prison numbers as "176-" followed by random digits (except in their first story, where they have no prison numbers). However, in a few of his later stories, Barks did not continue this tradition and used random numbers again instead. But subsequent writers and artists by default still mostly uses the 1, 6, and 7 combinations for the Beagle Boys in the modern comic books. The Beagle Boys also have their prison numbers tattooed on their chests. According to Don Rosa's The Beagle Boys vs. The Money Bin (2001), the Beagle Boys have been known by their prison numbers since their childhood, and they do not even know their real names themselves. Their parents do know their real names, but demand a bribe from their sons to let them know. Also according to that story, Blackheart Beagle does not remember his sons' names. Carl Barks used to include the words "Beagle Boys, Inc." on their shirts under their numbers, which was later deleted in reprints. It can either be assumed that this was a reference to Murder, Inc., a name for organized crime groups in the 1930s and 40s; or that they are a criminal organization very similar to a real business, but neither is certain. In one comic, the Beagle Boys have a worldwide organization