The Mesopotamian king had complete and repressive control over his subjects and forced many of them to build ziggurats to his honor. Many of these pyramidal, stair step, towers were built at a great cost.
The burden of the King's unrelenting drive for immortality eventually drove a small band of brick makers to consider assassination as the only way to escape the King's terror. Unfortunately, their elaborate plans, all written on expensive parchment, failed and they were soon pursued by the King's general in charge of defense.
The assassins fled to the Valley of the Ziggurats to hide. While there, they began destroying the plans they had drawn up by burning them. And the general, who was close on their tail, noticed the smoke from their fire rise above the ziggurats.
Using the smoke as a beacon to their hideout, the general closed in on the assassins. It was only a matter of time until he had destroyed them. In the process he proved that a searching general can determine that smoking ziggurats are dangerous to your health.