Britannia All at Sea (Harlequin Romance, No. 2169) [first edition]

He should have been impossible to love-- He was overbearing and insufferable! yet when Brittania met Professor Luitingh van Thien who came to her hospital as a visiting consultant surgeon, she promptly fell in love with him@ So, when the professor went back to Holland, Britannia followed him. Theres she met the beautiful and sophisticated Madeleine de Venz who would apparently, make a much better wife for the professor. Or would she?