Witch cat watchcat protocol XXVII

In October 2017, Watchcat Sammy and a witch cat put their heads together and solved The Case Of The Suspicious Visitor.  (Watchcat Headquarters isn't known for its creative case file titles.)  That was a satisfying result of experience and teamwork for both cats:

Watchcat protocol XXVII

One Summer day in 2003, Watchcat Headquarters decided that guarding the basement hallway required two watchcats.  Thus, Rosie monitored the hallway from the counter...

...and Sammy monitored the hallway from the floor:

I'm not sure why this assignment required two watchcats; the rationale is still classified.