1;  God instructs the Israelites in their journey.
  5;  Pharaoh pursues after them.
 10;  The Israelites murmur.
 13;  Moses comforts them.
 15;  God instructs Moses.
 19;  The cloud removes behind the camp.
 21;  The Israelites pass through the Red sea, which drowns the
     Egyptians.

 * the Lord spake.
  12:1  13:1