George, Charles, and Edward, circa 1878. George would start publishing his own games at age sixteen, and eventually rope in his older brothers.
What were they up to around this time? Here's part of an 1879 letter from Edward. He's planning his wedding. Georgie went up to Lexington and is "having a beautiful time." "Charlie had an encounter with those irish fellows in one of the low streets near the old (?) depot Saturday. He received two heavy blows in the face but think that he handled his fists to advantage..."
For more information on GSP, note his entry in the slightly shady leatherbound vanity publication, "Encyclopedia of American Biography."