The following brief excerpts from A Maze of Death — Philip K Dick  (1970) offer up some pretty spooky overtones and correspondences:

 
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There was one class of people who did not carry a copy of Specktowsky’s Book — did not carry it because they were not allowed to read it. The ostriches shut up in the planetwide aviary at Terra; those who lived in the sandpile because they had crumbled under the enormous psychological pressure suffered while emigrating. … The Interplan West military base, where General Treaton operates, is on Terra, tangent to the aviary. What a coincidence. … And then a gross, vivid, terrifying thought came to him. Suppose we’re all ostriches from the aviary, he said to himself. Suppose we don’t know; Interplan West cut a memory conduit in our friggin’ brains. … So we are an experiment, then, he thought. I now know what we wanted to know. And it might explain why I have that tattoo stuck away on my right instep.  [Chapter 10]

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Wade Frazer said, “But there’s nothing on Terra except the aviary! And nobody except ostriches!”

“Plus Interplan West military barracks and research installations,” Seth Morley said, but his voice ebbed; it lacked conviction and enthusiasm. “We’re an experiment,” he said, anyhow. “As we guessed last night. A military experiment being carried out by General Treaton.” But he did not believe it either. “What kind of military personnel wear black leather uniforms?” he said. “And jackboots … I think they’re called.”

Russell, in a modulated, disinterested voice, said, “Aviary guards. A sop to keep up their morale. It’s very discouraging to work around ostriches; introduction of the new uniforms, three or four years back, has done a great deal of morale-boosting for the personnel.”  [Chapter 14]

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