Acute lymphadenosis compared with acute lymphatic leukemia, Part II - Hematologic studies.

Downey characterized reactive lymphocytes, usually associated with viral illnesses, such as Epstein-Barr virus, but which can also be caused by drug reactions or other pathogens. He classified the cells into type 1, type 2, and type 3. They were later called "Downey cells".

(Thanks to Juan Weiss for this reference and its interpretation.)