From regular reader and chess history buff Brian Karen comes this fascinating letter (also published in Chess Today):
I noticed this clause in the 'Rules and Regulations' for the Steinitz - Zukertort match of 1886. If only we had such conditions for Topalov - Kramnik and other recent matches :):
"While the match is pending the players shall be required to observe a gentlemanly behavior toward each other in their personal bearing and language, as well as in their communication direct or indirect, whether of a private character or intended for publication. Should any report, interview, or other information during the match, appear in the press, which may unjustly affect either player, then the two Umpires, or the Referee, may require a public disavowal or contradiction of any such unjust allegation, in any manner they may deem proper, to be made by one or both players. If, however, any ungentlemanly aspersion, reflecting on one of the players, be traced to his opponent directly or indirectly, the latter may be required to publish an apology and shall be subject o a fine of not less than ten dollars and not exceeding one hundred dollars, at the discretion of the Referee."
In fairness, Steinitz and Zukertort quarreled vehemently in the years leading to their match. But as the February 4, 1886 St. Louis Dispatch reported - "Steinitz has been attacking Zukertort bitterly in his chess magazine the past six months, but since they have been playing in this match they have been growing more friendly and Joseph says that Steinitz called his opponent "Zukey" yesterday.