The London assassination by umbrella in 1978 was of the Bulgarian (not Russian) dissident, Georgi (not Gregor) Markov.
First edition Guttenberg bibles were made in 1455, not 1456. Around 180 copies were printed. A second edition was not printed until 1457.
In several places the dialogue refers to Dana as an "executor"; however, a woman executor is properly called an "executrix".
After discovery of a radiopaque spot on the Lieutenant's film of the left scapular region, Dr. Mallard honors Jimmie by saying he would assist in the surgical excision. Jimmy makes the incision, then asks for "tweezers," which is not a term used by surgeons. The correct request would be for the "pick-up."