| Ratings 
 
 
  | Year | Rank | Edo | Dev. | Games |  
  | 1936 | 1903 | 1454 | (107) | 14 |  
  | 1937 | 1774 | 1459 | (112) | 0 |  
  | 1938 | 1738 | 1464 | (116) | 0 |  
  | 1939 | 1560 | 1469 | (120) | 0 |  
  | 1940 | 1332 | 1474 | (124) | 0 |  
  | 1941 | 1325 | 1479 | (127) | 0 |  
  | 1942 | 1177 | 1484 | (130) | 0 |  
  | 1943 | 1111 | 1489 | (133) | 1 |  
 
Rating table notes
 | 
| Biographical data |  | 
   | Name: Heffernan, J. |  
   | Born: |  
   | Died: |  |  |  |  
   | References |  | 
| Books |  
   | Di Felice, Chess Results, 1936-1940, page 356 |  
   | Di Felice, Chess Results, 1941-1946, page 343 |  |  |