Harper was at the top of her game in 1932, when she was called home because of an illness in the family. She then decided to give up tournament tennis for other tasks, including the rearing of three children. But she continued to follow the game and played for many years. She even had arthroscopic knee surgery at age 81 so she could continue to play. An adverse reaction to a general anesthetic sidelined her for good and precipitated a long, slow decline in her health. Harper is buried in Mountain View Cemetery in Oakland, California.
| Tournament | 1925 | 1926 | 1927 | 1928 | 1929 | 1930 | 1931 | 1932 | Career SR |
|---|---|---|---|---|---|---|---|---|---|
| Australian Championships | A | A | A | A | A | A | A | A | 0 / 0 |
| French Championships | A | A | A | A | A | A | A | A | 0 / 0 |
| Wimbledon | 3R | 1R | A | A | A | A | 4R | 1R | 0 / 4 |
| U.S. Championships | A | A | A | 3R | 3R | F | QF | QF | 0 / 5 |
| SR | 0 / 1 | 0 / 1 | 0 / 0 | 0 / 1 | 0 / 1 | 0 / 1 | 0 / 2 | 0 / 2 | 0 / 9 |
A = did not participate in the tournament.
SR = the ratio of the number of Grand Slam singles tournaments won to the number of those tournaments played.