Here’s another contemporary mention of the Cuban X Giants’ defeat of Rube Waddell and the semipro Murray Hills at New York’s Olympia Field on August 2, 1903—the game that may have been the source of Rube Foster’s nickname. From the Jersey Journal (August 13, 1903, p. 7):
The relevant sentence is this one:
Typically copy like this, retailing the victories of a traveling team, originated with the traveling team itself, there not being any easy way for reporters (or the manager of the local team) to keep track of black or semipro teams and all their doings. So, eleven days after the August 2 game in New York, it seems quite likely that E. B. Lamar was using the defeat of Waddell to advertise his Cuban X Giants.