What was Robert Louis Stevenson's sequel to 'Kidnapped'?

'Catriona' (also known as David Balfour) is an 1893 novel written by Robert Louis Stevenson as a sequel to his earlier novel 'Kidnapped' (1886). It was first published in the magazine Atalanta from December 1892 to September 1893. The novel continues the story of the central character in 'Kidnapped', David Balfour.

The book begins precisely where 'Kidnapped' ends, at 2 pm on 25 August 1751, outside the British Linen Company in Edinburgh, Scotland.

The first part of the book recounts the attempts of the hero, David Balfour, to gain justice for James Stewart (James of the Glens), who has been arrested and charged with complicity in the Appin Murder. David makes a statement to a lawyer and goes on to meet William Grant of Prestongrange, the Lord Advocate of Scotland, to press the case for James' innocence. However, his attempts fail, as after being reunited with Alan Breck he is once again kidnapped, and confined on the Bass Rock, an island in the Firth of Forth, until the trial is over, and James is condemned to death.

David also meets and falls in love with Catriona MacGregor Drummond, the daughter of James MacGregor Drummond, known as James More (who was Rob Roy's eldest son), also held in prison, whose escape she engineers. David also receives some education in the manners and morals of polite society from Barbara Grant, Prestongrange's daughter.