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Event table notes
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| Event data |  | 
   | Place: Philadelphia |  
   | Start date: 19 Mar. 1861 |  
   | End date:   Mar. 1861 |  |  |  
   | Notes: |  
   | Hilbert reports the result +3-2=1 for Leonard from Hazeltine's Clipper column of 13 Apr. 1861, and Reichhelm agrees. The first game, a win by Lewis, was played on the day of Leonard's arrival in Philadelphia, 19 Mar. 1861. |  |  |  |  
   | References |  | 
| Books |  
   | Hilbert, Tragic Life of Leonard, page 94, 106, 114 |  
   | Reichhelm and Shipley, Chess in Philadelphia, page 9 |  | Periodicals |  
   | [NYC], 13 Apr. 1861 |  
   | [NYC], 18 May 1861 |  | Web |  
   | Spinrad, Jeremy P.  [Collected results, 1836-1863] |  |  |