What is the history of the word lobbyist?

In July 2005, Public Citizen published a report entitled "The Journey from Congress to K Street": the report analyzed hundreds of lobbyist registration documents filed in compliance with the "Lobbying Disclosure Act" and the "Foreign Agents Registration Act", among other sources. It found that since 1998, 43 percent of the 198 members of Congress who left government to join private life have registered to lobby. The Washington Post described these results as reflecting the "sea change that has occurred in lawmakers' attitudes toward lobbying in recent years." The paper noted that