This is a great novel by Edward Phillips Oppenheim, the prolific English novelist who was in his lifetime a major and successful writer of genre fiction including thrillers and spy novels, and who wrote over a 100 of them.
The main characters are Rosina, Philip and Matthew, all of whom drudge away in rural England, in the glass factory owned by Rosina's uncle. Rosina wants to be an actress, Philip is the would-be poet, and Matthew hopes for a career in high finance. All three go off to London in "the passionate quest" for their respective hearts' desires.