public String itsHere(MOB mob, Room R)
	{
		if(R==null) return "";
		if((okMaterials()!=null)&&(okMaterials().length>0))
			for(int m=0;m<okMaterials().length;m++)
				if((R.myResource()&RawMaterial.MATERIAL_MASK)==okMaterials()[m])
					return "You sense "+RawMaterial.CODES.NAME(R.myResource()).toLowerCase()+" here.";
		if((okResources()!=null)&&(okResources().length>0))
			for(int m=0;m<okResources().length;m++)
				if(R.myResource()==okResources()[m])
					return "You sense "+RawMaterial.CODES.NAME(R.myResource()).toLowerCase()+" here.";
		return "";
	}