Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
On Oct. 11, 1958, a 5-year old male, domestic feline was admitted to Stange Memorial Veterinary Clinic with the following history. The owner had let the cat into the basement at 5: 00 or 6: 00 on the same morning. Later in the morning the owner found that cat paralyzed in the rear quarters. There was no previous known history of an injury or accident. Furthermore the cat walked into the basement in the morning showing no signs of lameness or paralysis.
"Aortic Thrombosis in the Feline,"
Iowa State University Veterinarian: Vol. 21
, Article 13.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol21/iss2/13