Which president was sent a 1,235-pound block of cheese, with a note that read: "the greatest cheese in america for the greatest man in america."

there is no image for me to refer

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".