But Captain Eltwiss was a servant to the Science he looked down on. The answer he had bragged about now appeared and it was a scientific contribution if ever there was one. A division of tanks, twenty or thirty of them with what appeared to be sledrunners invertedly attached to their fronts, rolled into sight. "Wirecutters," he explained with pride. "Same equipment used for barbedwire on the Normandy beachhead. Go through anything like cheese."

The tanks drew up in a semicircle and the drivers came out of their vehicles for lastminute preparations. A final check was made of gas, oil, and the positions of the wirecutters. Maps, showing the location of each house now covered by the grass, were studied and compasspoints checked against them. I admired the thoroughness and efficiency of the arrangements. So did the captain.

"The idea is simple. These tanks are shocktroops. Theyll cut their way into the middle of the stuff. This will give us entranceways and a central operating point, besides hitting the grass where its strength is greatest. From there—" he paused impressively—"from there we'll throw everything in the book at it and a few that arent. All the stuff they used before we came. Only we'll use it efficiently. And everything else. Even hush-hush stuff. Just got the release from Washington. The minute one of these stems shows we'll stamp it out. We'll fight it and fight it until we beat it and we won't leave a bit of it, no, sir, not one bit of it, alive."

He looked at me triumphantly. Behind his triumph was a hint of the vast resources and the slowmoving but unassailable force his uniform represented. It sounded as though he had been correct in his boast and something drastic indeed would "happen to Mr. Grass."

The tanks were ready to go at last and the drivers climbed back into them and disappeared, leaving the steel monsters looking as though theyd swallowed the men. Like bubbles of air in a narrow glass tube they began to jerk backward and forward, until at some signal—I presume given by radio—they jumped ahead, their exhausts bellowing defiance of the grass mauled and torn by their treads.

They went onward with careless scorn, leaving behind a bruised and trampled pathway. The captain followed in the track and I after him, though I must admit it was not without some trepidation I put my feet upon the battered and now lifeless mass packed into a hard roadbed, for I recalled clearly how the grass had wrenched the ladder from the firemen and how it had impishly attacked the broadcaster's equipment.

The tanks moved ahead steadily until the slope of the mound began to rise sharply and the runners of grass, instead of flattening obediently behind, curled and twisted grotesquely as the tracks passed over them, lightly slapping at the impervious steel sides. Small bunches, mutilated and crushed, sprang back into erectness, larger ones flopped limply as their props were pushed aside.

Then, suddenly, the tank we were trailing disappeared. There was no warning; one second it was pursuing its way, an implacable executioner, the next it had plunged into the weed and was lost to sight. The ends of the grass came together spitefully behind it, weaving themselves together, knitting, as we watched, an opaque blanket. It closed over and around so that the smooth track ended abruptly, bitten by a wiry green portcullis.

I was dismayed, but the captain seemed happy. "Now we're getting somewhere," he exclaimed. "The little devils are eating right into the heart of the old sonofabitch."

We stood there gaping stupidly after our lost champion, but the grass mound was enigmatic and offered us no information as to its progress. A survey of the other tracks showed their tanks, too, had burrowed into the heart of the weed like so many hounds after a rabbit.