The South Horizon Man (Ludwigtown, #4)

Whilst in London, Eleanor Seaton and Sarah Raeburn, two sisters from New Zealand, meet Georgina Innes, who works in the genealogical section of a tourist firm. When they invite Georgina to return with them to their remote sheep station to write up their family history, she jumps at the chance. In New Zealand, Georgina sifts through the family's papers and is amazed to discover that she is related to them. However, she is reluctant to reveal this information - and especially to Seth Oliphant, the sisters' handsome nephew.