Since this paper was written, evidence of 18th Dynasty occupation has been reported at the site of Pi-Ramesse (letter to John Bimson from Manfred Bietak, March 17, 1987) and at Tell er-Retabah, one of the candidates for Pithom (verbal communication to John Bimson from Hans Goedicke, April 24, 1987). This new evidence changes the picture completely and makes it possible that Exodus 1:11 does refer to activity in the 15th century B.C. However, this strengthens rather than weakens our main point, that Exodus 1:11 does not prove a 13th-century B.C. date for the Exodus.