Joan Smith: Escapade

Escapade by Joan Smith was published by Fawcett in 1977 and is the story of Ella Fairmont, who was playing a dangerous game by writing a gossip column as the mysterious Miss Prattle! Now that she finds herself falling in love with the Duke of Clare, she needs to hide the fact that she is Miss Prattle!!

This is an interesting cover by Allan Kass since we don't really see the heroine's face but only her profile. The hero is featured accepting a letter. The setting is unusual; maybe an art gallery or balcony of a famous building?