Then Tatnai ... did speedily - A concurrence of favorable events is mentioned as accelerating the restoration of the temple and infusing a new spirit and energy into the workmen, who now labored with unabating assiduity till it was brought to a completion. Its foundation was laid in April, 536 b.c. (Ezr 3:8-10), and it was completed on February 21, 515 b.c., being twenty-one years after it was begun [Lightfoot].