Interfitting ladder
FIG. 1 is a rear elevational view, broken away in the center thereof to indicate indeterminate length, of an interfitting ladder embodying my new design; 
     FIG. 2 is a side elevational view of said ladder, similarly broken away; 
     FIG. 3 is a front elevational view of said ladder, similarly broken away; 
     FIG. 4 is a top planar view of said ladder; 
     FIG. 5 is a bottom planar view of said ladder.