
Source:
www.cubanball.com/

1914 letter signed by Emilio Palmero, a Cuban pitcher who
because of his light skin passed for white and was one of the first
non-Caucasians in the majors. Being signed by John McGraw's Giants in 1914 was
such big news in Cuba that Palmero wrote to the Mayor of his hometown Guanabaco
on May 5, 1914 to inform them.
Source: Lelands.com