Law 630, Congress appropriated it for the chief of naval operations, and in June 1929, Charles Hughes became the first resident of what became known as Admiral's House. For the next 45 years, it served as the home of such Admirals as Richard Leigh, Chester Nimitz, and Elmo Zumwalt. Previous vice presidential residences and legislation Previously, serving vice presidents had lived in hotels or their own private homes. In 1923, to honor her late husband, Senator John B. Henderson's widow offered to provide their newly built home as an official residence. President Calvin Coolidge, who lived in a hotel when he served as vice president from 1921 to 1923, wrote in his autobiography that an "official residence with suitable maintenance should be provided for the Vice-President," and that the office "should have a settled and permanent habitation and a place, irrespective of the financial ability of its temporary occupant." In 1966, the House Public Works Committee approved the construction of a three-story vice presidential residence at the Naval Observatory. A month later, President Lyndon B. Johnson suspended construction until the economy improved; construction never restarted. The exact location was to be determined later by the GAO and the Navy. Construction was to commence on the residence when funding was available once the Vietnam War was over. In the interim, the Secret Service paid for expensive upgrades to the private homes of vice presidents Hubert Humphrey, Spiro Agnew, and Gerald Ford. Agnew lived in his house for only three months in 1973 before resigning; shortly after, he sold it at a large profit, in part because of the upgrades (additional quarters for the Secret Service, fences and a new driveway for example), paid for by the government. This resulted in a minor scandal. A subsequent investigation showed that it would be cheaper to immediately set up the new vice presidential residence rather than secure private homes. Rockefeller and Mondale In July 1974, Congress passed a new law to make Admiral's House the "official temporary residence of the vice president of the United States" effective upon the termination of service of the incumbent chief of naval operations. Work began on preparing Admiral's House to be the temporary vice president's residence later that fall, after Richard Nixon's resignation and move of the CNO to Quarters A at the Navy Yard. The decision was largely made as it was increasingly expensive to add security