1;  The passover is again commanded.
  6;  A second passover for the unclean or absent.
 15;  The cloud directs the removals and encampments of the
     Israelites.

 * A.M. 2514.  B.C. 1490.  An. Ex. Is. 2.  Abib.  in the first
   month.
   The fourteen first verses of this chapter evidently refer to
   a time previous to the commencement of this book; but as
   there is no evidence of a transposition, it is better to
   conclude with Houbigant, that "it is enough to know, that
   these books contain an account of things transacted in the
   days of Moses, though not in their regular or chronological
   order."

  1:1  Ex 40:2