But something’s different… something’s … been changed … don’t mean to bitch, folks, but, well for instance he could almost swear he’s being followed, or watched anyway. Some of the tails are pretty slick, but others he can spot, all right. Xmas shopping yesterday at that Woolworth’s, he caught a certain pair of beady eyes in the toy section, past a heap of balsa-wood fighter planes and little-kid-size En-fields. A hint of constancy to what shows up in the rearview mirror of his Humber, no color or model he can pin down but something always present inside the tiny frame, has led him to start checking out other cars when he goes off on a morning’s work.
—-Thomas Pynchon, Gravity’s Rainbow