Read "Operation Terror" by Murray Leinster online for free on Textopian. Full text with search, annotations, highlights, and AI-powered reading aids.
The driver was avidly curious about the area where supposedly no human being could survive. He asked absorbed questions, especially and insistently about the aliens. Jill said that she'd seen a few of them, but only at a distance. They'd been investigating the evacuated construction camp. They were about the size of men. She couldn't describe them, but they weren't human beings. He seemed to find it unthinkable that she hadn't examined them in detail.
Lockley came to her rescue. He observed that he'd been a prisoner of the invaders, and had escaped. Then the driver's curiosity became insatiable. He wanted to know every imaginable detail of that experience. He expressed almost incredulous disappointment that Lockley couldn't give even a partial description of the creatures. When convinced, he launched a detailed recital of the descriptions offered by the workmen from the camp. He pictured the aliens as hoofed like horses, equipped with horns like antelopes, fitted with multiple arms like octopi and huge multi-faceted eyes like insects.