The Invisible Intruder is a comic story written by Vic Lockman and drawn by Carl Barks. It features Scrooge McDuck, Donald Duck, Clerkie and Sir Surelock.
Plot[]
When he was a young boy, Scrooge McDuck slept in the lower drawer of a cupboard. As his fortune grew, so did his beds' sizes. Taken to its logical extreme, this means that the bed Scrooge sleeps in now is as large as a ballroom (and made of the best springs around). And one night, his bed begins to quiver and shake, and Scrooge draws the conclusion that an intruder (a thief?) is walking on the other end of the acre-wide mattress. He calls "the world's greatest detective", Sir Surelock, to guard him. Surelock is fast to find out the answer, and it is far from what Scrooge expected…
Behind the scenes[]
First published in August of 1963, this story was first printed in Uncle Scrooge #44 and was later reprinted in Walt Disney Comics Digest #27, Uncle Scrooge #153, DuckTales #7, The Carl Barks Library #5 and The Adventures of Uncle Scrooge McDuck in Color #41.

The Invisible Intruder was the first story to introduce the idea of young Scrooge McDuck having been a shoeshiner in Glasgow. This idea was picked up the next year for Chairman of the Bored, which added the detail that it was then that Scrooge earned his 'Number One Dime'. Both stories inspired Don Rosa for The Last of the Clan McDuck, and, though he adjusted the appearance of Young Scrooge to fit his own style, he copied panels from both stories (a good exemple is pictured on the left).