The meeting of Louis Charles Mahe de la Bourdonnais and Alexander McDonnell at London's Westminster Chess Club in 1834 was notable for a number of reasons. Hard-earned reputations were zealously protected, and masters of equal standing had seldom faced each other on even terms. The chess world was watching closely, but it was the actions of spectator William Greenwood Walker, who recorded each move of the 85 games, that has had the greatest impact. This recording and publication of game scores from a series of matches between masters was a first in chess history: The event gave birth to...