The Claverings

Harry Clavering is the only son of Reverend Henry Clavering, a well-to-do clergyman and the paternal uncle of the affluent baronet Sir Hugh Clavering. At the novel's beginning, Harry is jilted by his fiancée, the sister of Sir Hugh's wife, who proceeds to marry Lord Ongar, a wealthy but debauched earl.
Harry's father urges him to make the church his profession; but Harry aspires to become a civil engineer, of the type of Robert Stephenson, Joseph Locke, and Thomas Brassey. To this end, he becomes a pupil at the firm of Beilby and Burton.
A year and a half later, Harry has become engaged to Florence Burton, the daughter of one of his employers. He presses her for an early marriage; but although she loves him deeply, she refuses, insisting that they wait until he has an income adequate to support himself and a family. Wikipedia