Used by the routine at 60347. This special location handler routine is invoked when a character moves in a certain direction from one of the following locations:

Location(s)	Direction	Descriptor(s)
Inside no. 74, just to the left of the front door on the second and third floors	Left	47607
Between the stairwell and the first window to the left of the stairwell on each floor of the apartment building next to no. 19	Left	49009
Between the stairwell and the first window to the left of the stairwell on the second, third and top floors of the apartment building next to no. 74	Left	50072
Between the second and third windows from the left on the second, third and top floors of no. 17
Between the second and third windows from the left on the second, third and top floors of no. 15
Between the stairwell and the first window to the right of the stairwell on each floor of the apartment building next to no. 19	Right	50139
Between the stairwell and the first window to the right of the stairwell on the second, third and top floors of the apartment building next to no. 74
The right end of the catwalk

However, the routine at 60423 does nothing special, which means that the location descriptors that invoke it (see the table above) are redundant.

The other special location handler routine addresses can be found at 41238, 41494, 41750, 42006, 42262 and 42518.