Of course, the rate at which the pontoons were sunk began slowing. As the dam took shape, the current became faster. And, what was worse, turbulent.
Two men were killed on the eighth day. After knocking loose the scuttling pins, they failed to emerge from the hold quickly enough. What happened? No-one knew, or ever would. Probably one of them had slipped, and the other had gone to his aid. But there was no time, now, for anything but haste. The river which poured into the settling hull was not the sluggish stream it had been. The water hammered into the barge and drove it down like a pile driver. Days later, one of the bodies floated loose and was salvaged downstream.
By the end of the second week, the Euphrates was a snarling beast. As the Roman engineers extended the two lines of pontoons closer and closer to each other, the center of the river became a thundering torrent of water. The rest was not much better. As the water level rose behind the dam, the entire Euphrates became a cataract, pouring over the line of pontoons all across its width.
Casualties were now occurring daily—a matter of broken limbs and crushed fingers, for the most part, but there were fatalities also. On the twelfth day, the entire crew of a pontoon perished when they lost control of the barge just at the point when they were preparing to scuttle it. The heavily weighted craft was swept into the narrow channel in the center of the river. Before it was halfway through, the barge disintegrated, spilling its men into the torrent. Most of them were dead by the time their bodies were recovered. One man survived for half a day, his skull shattered and pulpy, before he finally expired.
The Roman troops had the worst of it, since they were doing the most dangerous part of the job, but those were not happy days for the Kushans either. Behind the Roman engineers extending the pontoons, the Kushans were set to work building the dam higher. Using their own barges, the captives hauled baskets full of stones and dropped them onto the submerged pontoons. The current piled the heavy baskets up against the wicker “sails.” The strain on those sunken masts and spars would probably have broken some of them, except that the Romans had lashed the masts together as they extended the line of pontoons.
Most of the Kushans, however, were engaged elsewhere. The stones used to bolster the dam had to be hauled out of the surrounding landscape. Fortunately, there were many stones to be found within a mile of the river. Mesopotamia had been farmed for millennia, but the topsoil was constantly being blown away and annual plowing brought up another layer of stones. These stones, as the centuries passed, were piled at the center or edges of fields. So there was no lack of stones, and none of them had to be dug up out of the soil. But it was still hard work for the Kushans, loading sledges and dragging them to the river.
At first, the Kushans were disgruntled.
Crazy Roman!
Why doesn’t the stupid bastard use the stones we already dug out of the Nehar Malka? Look! There’s a giant pile of the things—not three hundred yards away!
Who ever made this idiot a general, anyway?
As the days passed, however, the Kushans began to realize that the cretin Roman general apparently had other plans for those stones. What those plans were, the Kushans did not know. They were no longer permitted in the vicinity of the Nehar Malka. But, from a distance, they could catch glimpses of Roman engineers working around the enormous mound of rocks which the Kushans had piled on the north bank of the Nehar Malka. Digging tunnels, so it appeared. And they noted that the men involved in that work were the same Romans who manned the rocket chariots. Gunpowder experts.
The betting among the Kushan captives intensified.
Kurush and his Persian soldiers were not involved in any of this work. Theirs was the task of ensuring the work-site’s security. Every day, Kurush and his ten thousand Persian cavalrymen patrolled the region, extending their skirmishers to a distance of thirty miles in every direction. Abbu and the Arab scouts accompanied them in this work, as did a small number of the Roman troops. On a rotating basis, two battalions of Belisarius’ soldiers—one cavalry, one infantry—were assigned each day to assist the Persians. In truth, the assignment was more in the way of a relief than anything else. After the back-breaking and risky work of building the dam, every Roman soldier looked forward to a day spent in a leisurely march.