Some intriguing thing about early tennis is imo the use of pseudonyms and alias-names. Overall many tennis origins had some mysteries in it, including the word "tennis" itself, whose etymology isn't clear. Some say, it derivates from tense or tendon. The word "love" could come from egg. Many early players appeared under alias-names, when making entries in tournaments. Often they took names form literature or mythology. Hamilton called himself 'The Ghost'. The Irishman and later murderer Thomas Vere Goold called himself St. Leger. In Wimbledon some guys like Jules Verne made the draw. Dr. Joshua Pim, another Irishman, played a Davis Cup final tie against American Whitman (not Walt) as Mr. X. As late as in the twenties, Tilden played against some guys who called themselves Mr. Tennis. Even in the 50s at an US pro, a masked man appeared and played under the name of Mr. Tennis. Was it Bobby Riggs?