What is the significance of the numerical correspondence between the 42 camps or waypoints mentioned in the recounting of the forty years of wandering ([Bamidbar 33](http://he.wikisource.org/wiki/T0433)) and the fact that 42 of the 48 Levite cities mentioned in the same parsha (Masei) are of the ordinary non-refuge kind ([Bamidbar 35](http://he.wikisource.org/wiki/T0435):6)?