That was the result of an FBI regulation. All agents had to wear hats. Malone wasn't sure why, and his thinking on the matter had only dredged up the idea that you had to have a hat in case somebody asked you to keep something under it. But the FBI was firm about its rulings. No matter what the weather, an agent wore a hat. Malone thought bitterly that he might just as well wear a red, white and blue luminous sign that said _FBI_ in great winking letters, and maybe a hooting siren, too. Still, the Federal Bureau of Investigation was not supposed to be a secret organization--no matter what occasional critics might say. And the hats, at least as long as the weather remained broiling, were enough proof of that for anybody. Malone could feel water collecting under his hat and soaking his head. He removed the hat quickly, wiped his head with a handkerchief and replaced the hat, feeling as if he had become incognito for a few seconds. The hat was back on now, feeling official but terrible, and about the same was true of the fully-loaded Smith & Wesson .44 Magnum revolver which hung in his shoulder holster. The harness chafed at his shoulder and chest and the weight of the gun itself was an added and unwelcome burden. But even without the gun and the hat, Malone did not feel exactly chipper. His shirt and undershirt were no longer two garments, but one, welded together by seamless sweat and plastered heavily and not too skillfully to his skin. His trouser legs clung damply to calves and thighs, rubbing as he walked, and at the knees each trouser leg attached and detached itself with the unpleasant regularity of a wet bastinado. Inside Malone's shoes, his socks were completely awash, and he seemed to squish as he walked. It was hard to tell, but there seemed to be a small fish in his left shoe. It might, he told himself, be no more than a pebble or a wrinkle in his sock. But he was willing to swear that it was swimming upstream. And the forecast, he told himself bitterly, was for continued warm. He forced himself to take his mind off his own troubles and get back to the troubles of the FBI in general, such as the problem at hand. It was an effort, but he frowned and kept walking, and within a block he was concentrating again on the _psi_ powers. * * * * *