"Science fiction novelette in which the protagonist 'slips on a mathematical banana skin' and finds himself projected into a future dystopia."- Locke, A Spectrum of Fantasy, p. 55.

"Future dystopia brought about by science. All animals are destroyed. All culture eliminated."- Sargent, British and American Utopian Literature, 1516-1985, pp. 191-2.

"Actually, a dark satiric fantasy, apparently set in a parallel dimension or timeslip (rather than the future), where scientific meddling has destroyed animal life and humans from our plane of existence are trapped for food and eaten. The only appearance of this story that Collier would not allow to be reprinted." Bleiler, Science-Fiction: The Early Years 449. Bleiler (1978), p. 46.