House of Haunts cross-reference

[Daniel van Eijmeren]

According to "The Doom Diamond" (US 70), Beagle Boy 176-176 has 
learned medicine in prison.

Some stories earlier, in "The House of Haunts" (US 63), the Beagle
Boys receive their diploma's for finishing their courses in Studio 
Hours School. (176-176 is professor of encephalography.)

This must be a cross-reference. Maybe even more because 176-176 uses 
the same method in both stories. He taps on Scrooge's head (US 63) 
and tail (US 70).

Is this already mentioned somewhere?

--- Daniël

"Yeeeeowch! All at once a swordfish doesn't like me!"