The Olympian Cricket Club reorganized their Association, which was disbanded at the commencement of the war, on Monday last, by the election of the following officers-President, Chas. G. Lister; Vice-President, Horatio H. Walker; Secretary and Treasurer, S. Mason Graffen; Captain of Field, Harry Lex...The grounds are located at Eighth and Cooper streets, Camden.
-Philadelphia Inquirer, May 4, 1865
We knew that Mase Graffen played cricket in Philadelphia but all the evidence that I've seen was second-hand. Here we have some primary source material establishing for a fact that Graffen was a Philadelphia cricketeer.