The Tulip Tree (Classic Library, 164)

Sarah regretted impersonating her impetuous half sister, Madalyn. She began feeling the consequences of her deceit even before she reached Comyns Ridge in South Africa. Brent Milward, ranch manager, was a confirmed bachelor who pointedly emphasized his resentment of clinging women. But the more Sarah tried to avoid him, the more Brent saw her as a challenge. Soon Sarah was dangerously close to confessing. She loved a man who didn't even know her name!