Now this is fun stuff !! Campbell put it this way ("Hero with a Thousand Faces" - page 77
"With the personification of his destiny to guide and aid him, the hero goes forward in his adventure until he comes to the "threshold guardian" at the entrance to the zone of magnified power."
In the Chronicles, this, of course, occurs in Chapter Six, The Rusty Scuttle. Charlie just "happens" to wander into the old watering hole and be confronted by the scallywags and knife wielding sailors. Now, references to crossing the first threshold are all over literature. Books and films are filled with exciting adventures at this stage of the hero's journey. In Chapter Six, Charlie "meets" some of the old sea dogs who have been on the other side of the threshold. The characters who have already crossed the first threshold and are now there to "greet" the new hero traveler are usually seen as dangerous to the hero. Charlie wisely does not want to confront them. He needs to just "slip on by" without too much fuss and fiddle. That, of course, does not happen. There is a confrontation and things look to be going against him when along comes two hooded men who save the day. More latter.