LAKE GENEVA, Wis.— On most lakes, the mail arrives by truck. On Lake Geneva, it arrives by boat— and often with someone jumping from it onto the pier. Lake Geneva Cruise Line held its annual mailboat jumper tryouts Thursday, searching for the next members who will deliver mail to lakeside homes without the U.S. Mailboat Walworth coming to a complete stop. Lake Geneva’s Rivera Dock —Mail Boat Tryouts (Photo: Nazir Spencer) The job requires more t…